Adding Apis to DeflateStream and GZipStream (dotnet/corefx#10071)

Adding APM Apis to DeflateStream and GZipStream

Commit migrated from https://github.com/dotnet/corefx/commit/fb26cd82d67c9bf065fc7370a40684be74c8d571

Merge pull request dotnet/corefx#10038 from hann013/dev/StringIOClose

Added Close() methods to String IO

Commit migrated from https://github.com/dotnet/corefx/commit/f54608d82af24ff3568d1b92bb16509dc680bed2

Added tests for Close methods

Commit migrated from https://github.com/dotnet/corefx/commit/3f58b152cd27792cef61c2093c69158f973c7512

Added Close methods

Commit migrated from https://github.com/dotnet/corefx/commit/c186d174a16f78d625457ab2bef4c6e39f403c43

Merge pull request dotnet/corefx#10019 from hann013/dev/StringComparison

Updated StringComparison

Commit migrated from https://github.com/dotnet/corefx/commit/adec6611bc5ceaa14a0c1c49cd1ef7c9d5ca05ed

Updated tests to fix failing Linux Tests

Commit migrated from https://github.com/dotnet/corefx/commit/6b802fe69c96edc83ad04ca575751e521dea2c00

Added InvariantCulture/InvariantCultureIgnoreCase and tests

Commit migrated from https://github.com/dotnet/corefx/commit/d5ad9a2afe642f66a8f44e5c490ad16a64f8a540

Add back IHashCodeProvider/CaseInsensitiveHashCodeProvider to System.Collections.NonGeneric (dotnet/corefx#9967)

* Add back IHashCodeProvider/CaseInsensitiveHashCodeProvider to System.Collections.NonGeneric

This support is only for compatibility, but even though it's been obsoleted for a long time, it still shows up with a surprisingly high amount of usage.  I've ported them from desktop.

Commit migrated from https://github.com/dotnet/corefx/commit/6c86a907590110638cbfa38b3a2922dca6d6056e

Merge pull request dotnet/corefx#9978 from stephentoub/more_exit_code_tests

Add a few more Environment.Exit* tests

Commit migrated from https://github.com/dotnet/corefx/commit/66ffd16dea775e702f775f0156ba426e014e525c

Merge pull request dotnet/corefx#9970 from stephentoub/icloneable_ref

Add ICloneable back to System.Runtime contract

Commit migrated from https://github.com/dotnet/corefx/commit/eaaf700503ef2df2764d7d8fdcebbe76a00f166d

Add a few more Environment.Exit* tests

- Verifies that Environment.Exit(exitCode) passes the code through
- Verifies that Environment.ExitCode passes the code through even after Main exits, e.g. from a foreground thread

Both of these currently fail due to a coreclr issue.

Commit migrated from https://github.com/dotnet/corefx/commit/08e22134ee3ff02afed5cad8809e23633aa019e2

Merge pull request dotnet/corefx#9968 from stephentoub/readonlycollectionbuilder

Expose ReadOnlyCollectionBuilder<T> from System.Linq.Expressions

Commit migrated from https://github.com/dotnet/corefx/commit/e447e8d79854ed811c7d394065a9e1c4dfd79505

Merge pull request dotnet/corefx#9969 from joperezr/RevertImplicitMemberRemoval

Reverting commits: d8cad4f and 5b066c since they introduced compatibility issues

Commit migrated from https://github.com/dotnet/corefx/commit/20b0dbde05e861225fa522e1e05cc52796932df8

Add ICloneable back to System.Runtime contract

We've got a bunch of types outside of mscorlib that implement this interface in desktop, and the lack of it is causing issues, e.g.  https://github.com/dotnet/corefx/issues/9884.  This commit adds the interface to the contract; when we subsequently update the packages, then we can start implementing this in types outside of System.Runtime (since System.Runtime is mostly a facade on System.Private.Corelib, the types it "contains" already implement the interface).

Commit migrated from https://github.com/dotnet/corefx/commit/fb006859a8048206cea3dec78e0d64d728f6761c

Reverting commits: d8cad4f and 5b066c since they introduced compatibility issues

Commit migrated from https://github.com/dotnet/corefx/commit/02f3cc6625c2dac641a6ff3129f55886a7a7f589

Expose ReadOnlyCollectionBuilder from System.Linq.Expressions

One of the more prominently used types from System.Core in desktop that's missing from our public surface area in corefx.

Commit migrated from https://github.com/dotnet/corefx/commit/c38eff56fa84a5cfb70ea475a2945b464f234319

Merge pull request dotnet/corefx#9939 from stephentoub/env_tests

Add a test for Environment.ExitCode

Commit migrated from https://github.com/dotnet/corefx/commit/64673e33af5567c1150def7a59f6f6d0f71b5f53

Add a test for Environment.ExitCode

We've consolidated almost all of our remote execution logic (testing code in another process) into a single shared console app that supports using reflection to invoke delegates, but to test ExitCode properly, we need t a void-returning Main method.  This commit adds such a little helper app to the System.Runtime.Extensions tests suite and adds a test that uses it.  That test is disabled until the associated issue in coreclr is fixed.

Commit migrated from https://github.com/dotnet/corefx/commit/7608f2462a10f278f7407b76514b0fd3fda1ea9d

Merge pull request dotnet/corefx#9901 from joperezr/mscorlibRef

Adding member/types added in the Core surface area for mscorlib classic assembly

Commit migrated from https://github.com/dotnet/corefx/commit/8a15d65c607bc455d03cd7898b1d7030f16f4b16

Fixing CookieCollection interface methods (dotnet/corefx#9852)

Fixing CookieCollection interface methods

Commit migrated from https://github.com/dotnet/corefx/commit/5b066cd8d2bbd745710ff40e88bd193b2fd5ca3e

Merge pull request dotnet/corefx#9897 from stephentoub/systemjson

Add System.Json

Commit migrated from https://github.com/dotnet/corefx/commit/3f4c1df9a980ca6640d1ce28460b43f5312ca582

Adding member/types added in the Core surface area

Commit migrated from https://github.com/dotnet/corefx/commit/d8cad4f7eb0ccbef8eb76f8961ee5695ba2af43f

[mscorlib] Adding the new types that were introduced in coreclr repo (dotnet/corefx#9712)

Adding member/types that were introduced by coreclr.

Commit migrated from https://github.com/dotnet/corefx/commit/2142323d5b4013dd5d2d3abb4e402b074117bdaa

System.Json is inbox on Xamarin platforms

Commit migrated from https://github.com/dotnet/corefx/commit/391dae1d0f3789e0c11190f357e02fbcc03570db

Make System.Json target netstandard1.0

Build and package as a netstandard1.0 assembly.  Clean up project file.

Commit migrated from https://github.com/dotnet/corefx/commit/99dd5d4734aa59919b62bb0d46cd4b4360dd7ca7

Clean up tests a bit

Commit migrated from https://github.com/dotnet/corefx/commit/12126fd05f3365dcf37b41245fddc0d52f759233

More code cleanup

Commit migrated from https://github.com/dotnet/corefx/commit/80e9fdf355b7881f567452206dd40d92623ae59a

Move resources into Strings.resx

Commit migrated from https://github.com/dotnet/corefx/commit/0950e0322460b8f645080de2a91f9b1acd46a639

Ran codeformatter

Commit migrated from https://github.com/dotnet/corefx/commit/9af844cd6705b9dacbf08655d45a110d16355cb9

Port Mono code for System.Json and add project scaffolding

Commit migrated from https://github.com/dotnet/corefx/commit/3957f11f8d8f90966be12ce6aec7e118fa7b6b94

Merge pull request dotnet/corefx#9851 from stephentoub/devapi_environment_corefx

Move Environment and friends to corefx

Commit migrated from https://github.com/dotnet/corefx/commit/c4af76eed2704416ad8f6e24291e7828a2477bd1

Remove DEBUG ifdef

UserName test is failing on debug (with the initial buffer size set to 1) due to what appears to be a CentOS bug:
https://bugs.centos.org/view.php?id=7324

Commit migrated from https://github.com/dotnet/corefx/commit/565926e26af1a6172fe6faeaad5197ad0364782e

More tweaks to Environment

Commit migrated from https://github.com/dotnet/corefx/commit/51920556182596c42efa36a43869229434507e3b

Address more PR feedback and additional fixes

Main changes:
- Rename Environment Windows files to .Win32.cs and .WinRT.cs
- Refactor environment variable functions to help with tree shaking
- Fix environ access on macOS
- Remove direct Environment dependency from System.Diagnostics.Debug causing ambiguity

Commit migrated from https://github.com/dotnet/corefx/commit/8ea801cdd2bc2d661b78e300064b43c8733b0471

Address PR feedback

PR feedback:
- Remove AppX checks and split Environment.Windows into Environment.Windows, Environment.CoreCLR, and Environment.NETNative
- Change marshaling of service pack version field in OSVERSIONINFOEX
- Forward TickCount to EnvironmentAugments rather than implementing it via a P/Invoke
- Move environment variables support from coreclr to corefx

Plus:
- Use GetLogicalProcessorInformationEx to get the processor count, and cache it
- Use GetUserNameExW instead of GetUserNameW, as it's available on more platforms
- Fix compilation for .NET Native
- Fixed a test

Commit migrated from https://github.com/dotnet/corefx/commit/282ad11461c480a282a529c38d8fc353bc03663b

Move Environment and friends to corefx

Currently System.Runtime.Extensions type forwards to the Environment in the runtime, which means we need to implement functionality in both coreclr and corert.  It's also missing functionality, which means to add that functionality back we'd need to do so in both runtimes, and we'd miss out on sharing code with elsewhere in corefx.

This commit:
1) Adds Environment, EnvironmentVariableTarget, OperatingSystem, and PlatformID to corefx so that System.Runtime.Extensions contains the type rather than forwarding to it.
2) Adds implementations of all of the missing members: CommandLine, CurrentDirectory, ExitCode, Is64BitProcess, Is64BitOperatingSystem, OSVersion, SystemPageSize, UserInteractive, UserName, UserDomainName, Version, WorkingSet, GetLogicalDrives, GetFolderPath, and the overloads of Get/SetEnvironmentVariable(s) that take an EnvironmentVariableTarget.
3) Adds the additional members to the contract.
4) Adds some basic tests to ensure basic functionality works.

Work that still needs to be done after this:
1) Add an EnvironmentAugments type to System.Private.Corelib in both corefx and corert, use that to replace the reflection-based hack in this commit, then remove the current Environment from Corelib's model.xml so that the rewriter will make it internal.  As part of this, we need to determine how to handle "IsAppXmodel/DesignMode" from corefx, whether we need two different builds for Win32/WinRT, etc.
2) Fix Get/SetEnvironmentVariable(s) to not ignore the EnvironmentVariableTarget.  This should be doable once (1) is done.
3) Add more support to the Unix implementation of GetFolderPath for more special folders
4) Add a GetTickCount method to the System.Native native lib, ala the implementation in libcoreclr; the current implementation is functional but slower than it could be.
5) Implement more Windows functionality if/when missing functions become available: SHGetFolderPath and GetVersionExW.
6) Use GetLogicalProcessInformationEx in ProcessorCount (or delegate to the implementation in coreclr).
I will open issues for each of these prior to merging this commit.

Commit migrated from https://github.com/dotnet/corefx/commit/fe5f4fbebc9e85c8e512a273567719dca15ac764

Merge pull request dotnet/corefx#9850 from joperezr/SystemCore

Adding types/members to System.Core surface area that were introduced in Core.

Commit migrated from https://github.com/dotnet/corefx/commit/6bbf0f16f46cf8d502379550046c9b4d5c758f11

Adding types/members to System.Core surface area that were introduced in Core.

Commit migrated from https://github.com/dotnet/corefx/commit/67a624addd0c3dd42d8110ba1e63fa09a07a4316

Merge pull request dotnet/corefx#9745 from JeremyKuhne/GetLogicalDrives2

Implement GetLogicalDrives for Unix

Commit migrated from https://github.com/dotnet/corefx/commit/1f361a815ad3ffbbf5240ea22d7abe5ad94cacce

Moving all of the Compat Assemblies to flat folder (dotnet/corefx#9782)

Moving all of the Compat Assemblies to flat folder

Commit migrated from https://github.com/dotnet/corefx/commit/5eb4d84c51fdf0e90b9d9e143873131a7d51373f

Implement GetLogicalDrives for Unix

Implement and unify code for getting drives/mount points

Commit migrated from https://github.com/dotnet/corefx/commit/20ddbef76e857901e9c2baac1c0723cf9951324a

Merge pull request dotnet/corefx#9741 from stephentoub/console_keys

Add missing members to System.Console.dll

Commit migrated from https://github.com/dotnet/corefx/commit/2c87b705af5099258ea29f6de4de67afd45db797

Address PR feedback

Commit migrated from https://github.com/dotnet/corefx/commit/152746a42ee57b000fe14f661907f7422a97fbd8

Add missing members to System.Console.dll

Adds back missing:
- Values in the ConsoleKey enum
- OpenStandard* overloads that take an Int32
- __arglist-based Write* methods (but these are commented out as ArgIterator and friends aren't yet exposed from System.Runtime)

Commit migrated from https://github.com/dotnet/corefx/commit/1325c14bf1763ea9562d3725f8db5b4ca9ce78a1

Merge pull request dotnet/corefx#9736 from JeremyKuhne/GetLogicalDrives

Add GetLogicalDrives.

Commit migrated from https://github.com/dotnet/corefx/commit/0b42956d46aab9f8807bea007aec05ade32e1e7a

Add GetLogicalDrives.

Commit migrated from https://github.com/dotnet/corefx/commit/3032cd204abd1f07058af805c5e57726eecfd621

Define the surface area in code for the facades instead of using net46 (dotnet/corefx#9585)

Define the surface area in code for the facades instead of using net46

Commit migrated from https://github.com/dotnet/corefx/commit/f7698c4d34cb00c9e69632fd155e1677e2ecd1b5

Merge pull request dotnet/corefx#9607 from weshaggard/FIdevapi

Merge master into dev\api

Commit migrated from https://github.com/dotnet/corefx/commit/f09218924a14cb518b6fd8b1cecdc6cce908c95a

Update another NetStandard.Library references to 1.6.1

Commit migrated from https://github.com/dotnet/corefx/commit/bc6fabd9ee9c587c0a178c0a5fa0a75f74b9911d

Fix some more invalid package versions.

Commit migrated from https://github.com/dotnet/corefx/commit/c95ffa67019e5e0c16dd24abcd7e82bbe2c7cef5

Fox invalid package versions after merge.

Commit migrated from https://github.com/dotnet/corefx/commit/d5ff7608ea7c78f72636cc5cc0508547aa283b08

Merge branch 'master' into dev/api

Merge conflicts:
src/System.IO/ref/System.IO.csproj
src/System.IO/src/System.IO.csproj
src/System.IO/tests/System.IO.Tests.csproj
src/System.IO/tests/project.json

Commit migrated from https://github.com/dotnet/corefx/commit/11eb1de5f8f2b11066e0d6caedbf40c642d17472

Merge pull request dotnet/corefx#8607 from tijoytom/master

Updating contracts for new UTF8 string marshalling APIs

Commit migrated from https://github.com/dotnet/corefx/commit/926bdd0e860b9bb4f13e6c562575e59aee2ff9d0

Merge pull request dotnet/corefx#9601 from dotnet-bot/UpdateDependencies20160622010859

Updating CoreFx dependencies to beta-24222-03

Commit migrated from https://github.com/dotnet/corefx/commit/dab51783edcc970f9cfb7d38b12d49fb7ff0fbcb

Update S.T.RegularExpressions to version 4.2.0

Commit migrated from https://github.com/dotnet/corefx/commit/9ce507c4f5c570619709c051573fb65d81c63977

Updating contracts for new UTF8 string marshalling APIs

We're adding a new API version which needs to be OOB on desktop.
Ensure we continue to build the 4.6.2 version.
Right now we're lying and saying .NETCoreApp1.0 supports the latest API.
Once we have a netcoreapp1.1/netstandard1.7 we'll need to update to use
that and either redistribute or cross compile for netstandard1.5/
netcoreapp1.0.

Commit migrated from https://github.com/dotnet/corefx/commit/1ba2d172367729f7472324c7197cae02f4796874

Updating CoreFx dependencies to beta-24222-03

Commit migrated from https://github.com/dotnet/corefx/commit/087ec74b9e436299974dce655741a3dcc98f5d1c

Merge pull request dotnet/corefx#9593 from dotnet-bot/UpdateDependencies20160622051918

Updating External dependencies to beta-24222-00

Commit migrated from https://github.com/dotnet/corefx/commit/a181783ef0c51da547144d78b81bb07f77923228

Updating External dependencies to beta-24222-00

Commit migrated from https://github.com/dotnet/corefx/commit/90dac98c837b7624a743c7a6c9a0e3a2cf27b504

Merge pull request dotnet/corefx#9586 from Priya91/fixprocess

Add NERR_UserNotFound code to check on netuserdel.

Commit migrated from https://github.com/dotnet/corefx/commit/848e16f42cbce0f7f2f15171fadf065baa6e577a

Add usernotfound code to check on netuserdel.

Commit migrated from https://github.com/dotnet/corefx/commit/f16267c5ebbc0930604074f06ad85680395dd482

Disable SocketOptionNameTest.MulticastInterface_Set_AnyInterface_Succeeds on Fedora 23, while we investigate why this test has been failing. (dotnet/corefx#9580)

Commit migrated from https://github.com/dotnet/corefx/commit/21936668c71cd9e3951f7ab4e9c8ac253ca79d4e

Merge pull request dotnet/corefx#9526 from Priya91/regexgroup

Bring in Group.Name API from future branch, to be supported for net463

Commit migrated from https://github.com/dotnet/corefx/commit/a85d1f1f46f53f2e249d84bef0f2083fc19f1a84

Merge pull request dotnet/corefx#9575 from dotnet-bot/UpdateDependencies20160621062520

Updating CoreFx dependencies to beta-24221-04

Commit migrated from https://github.com/dotnet/corefx/commit/c3a7bcabaa4bf82299d9f486c8b3529f9c04c93b

Merge pull request dotnet/corefx#9573 from dotnet-bot/UpdateDependencies20160621052041

Updating External dependencies to beta-24221-00

Commit migrated from https://github.com/dotnet/corefx/commit/053ee23b44e87b533119b9a5ccb741cdd142e2a8

Merge pull request dotnet/corefx#9565 from stephentoub/ws_refactoring

Several more WebSocket tweaks

Commit migrated from https://github.com/dotnet/corefx/commit/cded4394fee8bbfaad624e2e1816bf3c9c72207f

Updating CoreFx dependencies to beta-24221-04

Commit migrated from https://github.com/dotnet/corefx/commit/82aa3ea6236d6990a50770fb77b79ffb4e06c0b5

Updating External dependencies to beta-24221-00

Commit migrated from https://github.com/dotnet/corefx/commit/84134e5d027d30efcdc4bf3824b63fc7607b8e6f

Merge pull request dotnet/corefx#9569 from dotnet-bot/UpdateDependencies20160621011417

Updating CoreFx dependencies to beta-24221-03

Commit migrated from https://github.com/dotnet/corefx/commit/3b6f18783574dae9ec58f50e5adacc5302330b69

Updating CoreFx dependencies to beta-24221-03

Commit migrated from https://github.com/dotnet/corefx/commit/6e72d3c127cae0a175c63dc942b8c7d8ac5da38b

Merge pull request dotnet/corefx#9567 from dotnet-bot/UpdateDependencies20160621071747

Updating CoreFx dependencies to beta-24221-02

Commit migrated from https://github.com/dotnet/corefx/commit/42cb374a130ea3116322e1854aa88ffb3cf15801

Updating CoreFx dependencies to beta-24221-02

Commit migrated from https://github.com/dotnet/corefx/commit/818ad5af9340661114d112e6f7d511e380bc4f81

Merge pull request dotnet/corefx#9566 from karajas/updateBT

Update BuildTools to version 1.0.26-prerelease-00521-01

Commit migrated from https://github.com/dotnet/corefx/commit/ee647f58be1c45710c2cffbf7a01075756a84f48

Update BuildTools to version 1.0.26-prerelease-00521-01

Commit migrated from https://github.com/dotnet/corefx/commit/145461779618b860165ba21f93d8890eb9b1ed17

Merge pull request dotnet/corefx#9560 from MattGal/Update_Xunit_Console_NetCore

Update BuildTools.TestSuite and Xunit.Console.NetCore runner

Commit migrated from https://github.com/dotnet/corefx/commit/e3b708058ff90c760c7ac32d93c9f492fab95b21

Merge pull request dotnet/corefx#9525 from JeremyKuhne/BumpSystemIO

Bump version for System.IO

Commit migrated from https://github.com/dotnet/corefx/commit/604305e27342e942f153576495a002774251c852

Update references to Microsoft.DotNet.BuildTools.TestSuite to a version that understands uap10.0, add version validation rule for same.

Update reference to Xunit.Console.Netcore to pick up new version which does not throw if Console Color APIs do.

Commit migrated from https://github.com/dotnet/corefx/commit/91260ea102e681b16864596f0b9b2f14d3be82be

Merge pull request dotnet/corefx#9530 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/corefx/commit/dd029f5f09cca533e27a3c52005182781aa0c2f2

Merge remote-tracking branch 'upstream/master' into from-tfs

Commit migrated from https://github.com/dotnet/corefx/commit/ee647a1b03d8a5cdd9cc75ec58619fce4ce1d68b

Respond to PR feedback.

Commit migrated from https://github.com/dotnet/corefx/commit/b21352ae3809a129e38468bbc44be35ebcac34f7

Delete now dead code

Commit migrated from https://github.com/dotnet/corefx/commit/107ee39aadfef438779d8de382fd95756e18d7a1

Handle more bad protocol cases

These weren't flagged by the test suite, but they better match the spec.

Commit migrated from https://github.com/dotnet/corefx/commit/028b5807d9de87652847956f24d52ed76cd70db5

Merge pull request dotnet/corefx#9548 from ellismg/port-http2-debian-test-fix

Allow the HTTP2 protocol test to pass with untrusted chains on Debian.

Commit migrated from https://github.com/dotnet/corefx/commit/12f1d055b4ac1ed41b1e4501e2a10a3cc24fc305

Capture exception from send method into returned task

Rather than allowing it to escape synchronously from the method.

Commit migrated from https://github.com/dotnet/corefx/commit/f1a6ea4ef8dbf61f840c247fba2bb2d481e25bdc

Small refactorings/fixes in WebSockets managed client

- Separate handling of close and ping/pong messages into their own functions.  This helps to keep the main receive function a bit more streamlined, and helping with the more common case we care to optimize for, sending and receiving.
- Remove two locals from the receive async function; this shrinks the size of that async state machine when yielding by a few bytes.

Commit migrated from https://github.com/dotnet/corefx/commit/ef8fd9e532190dff3d6c343e40b8b0fba5684217

Adding the rest of the facades using net46 as a base surface area (dotnet/corefx#9493)

Adding the rest of the facades using net46 as a base surface area

Commit migrated from https://github.com/dotnet/corefx/commit/bac7a4d6dec8cf22810151d22de7bc4b0bb25ece

Merge pull request dotnet/corefx#9537 from stephentoub/http_test_parallel

Allow default xunit parallelization for System.Net.Http.Functional.Tests

Commit migrated from https://github.com/dotnet/corefx/commit/958a18a4976510ec8947abc1d0d1d8ab4efee9f5

Merge pull request dotnet/corefx#9531 from tmat/MetadataBuilderTests

MetadataBuilder tests, API polish, docs

Commit migrated from https://github.com/dotnet/corefx/commit/e9d7ee6389d67bff036f02712651ae2f30e0a3e4

Mark another ActiveIssue

Commit migrated from https://github.com/dotnet/corefx/commit/daa30fcf33d57203456ed6c0ce8c42650074d5db

Separate diagnostics tests into their own class

The only change to the logic is that the tests now use RemoteInvoke to run each test in its own process, so as to avoid EventSource and DiagnosticSource interference.

Also removed the xunit attributes from the assembly that prevented parallelization.  It's no longer needed as of this change.

Commit migrated from https://github.com/dotnet/corefx/commit/542d85e15bfe5fdeb59d7e6f7fb3b15a08640ebd

Add remote executor support for an async method

Commit migrated from https://github.com/dotnet/corefx/commit/4dff47ae9dde3a0ec40af9f3d8ba0c485c1384e0

Allow the HTTP2 protocol test to pass with untrusted chains on Debian.

The TLS context is set up to make this chain:
  CN=http2.akamai.com, O=Akamai Technologies Inc., L=Santa Clara, S=CA, C=US
  CN=Verizon Akamai SureServer CA G14-SHA2, OU=Cybertrust, O=Verizon Enterprise Solutions, L=Amsterdam, C=NL
  CN=Baltimore CyberTrust Root, OU=CyberTrust, O=Baltimore, C=IE
  CN=GTE CyberTrust Global Root, OU="GTE CyberTrust Solutions, Inc.", O=GTE Corporation, C=US

making use of the cross-signed Baltimore CyberTrust Root certificate.
Unfortunately, that chain is not trusted on Debian 8.4 (GTE CyberTrust Global Root was removed), and a combination of data and installed software results in the valid chain using the self-signed Baltimore root is never built.

To prevent this situation from making the tests show as a failure, selectively allow Debian 8 to succeed on an incomplete chain.

Commit migrated from https://github.com/dotnet/corefx/commit/316370ac1d58a90f6788ecb924b41cc93aec043e

Merge pull request dotnet/corefx#9544 from stephentoub/clientcert_test

Tweak HTTP client certificates test and add ActiveIssue

Commit migrated from https://github.com/dotnet/corefx/commit/f42926c99b7d5311b61065b347fc05f7b911671a

MetadataBuilder tests, API polish, docs

Commit migrated from https://github.com/dotnet/corefx/commit/0029217ed7fe886eff04deb9c2ea6529ef025885

Merge pull request dotnet/corefx#9524 from ericstj/Update-beta-24217-04

Update CoreFx packages  to beta-24217-04

Commit migrated from https://github.com/dotnet/corefx/commit/2c42a8f7b759f5f3973a05e7abf54144bba6702d

Fix reference assembly non-stable refs

Commit migrated from https://github.com/dotnet/corefx/commit/d6b3393cb53b1775fd88db37ccebea3aafae5f18

Fix product binary non-stable refs

Commit migrated from https://github.com/dotnet/corefx/commit/73e6c557b8e4e94c1b3f9bb27c78fbe18685aaac

Ensure we reference the latest Lineup package.

Commit migrated from https://github.com/dotnet/corefx/commit/26bd9740848d45888bf9cb7b472201856ed36f62

Tweak HTTP client certificates test and add ActiveIssue

With forced GC/finalization at the right moment, the test currently fails on Windows.

Commit migrated from https://github.com/dotnet/corefx/commit/4cdb8dc1ba73ef02ef719b9a0ee336dbefca3b10

Merge pull request dotnet/corefx#9536 from stephentoub/add_ws_retry

Add retry to GetConnectedWebSocket

Commit migrated from https://github.com/dotnet/corefx/commit/2bcc5419a37f7444805d4620e3af109a53b0d4f2