c-ares version 1.17.1

Due to a packaging issue with 1.17.0, we have released 1.17.1 to address that
issue.  See 1.17.0 release notes below..


c-ares version 1.17.0

Security:
 o avoid read-heap-buffer-overflow in ares_parse_soa_reply found during
   fuzzing [2] [3]
 o Avoid theoretical buffer overflow in RC4 loop comparison [5]
 o Empty hquery->name could lead to invalid memory access [15]
 o ares_parse_{a,aaaa}_reply() could return a larger *naddrttls than was
   passed in [17]

Changes:
 o Update help information for adig, acountry, and ahost [4]
 o Test Suite now uses dynamic system-assigned ports rather than hardcoded
   ports to prevent failures in containers [10]
 o Detect remote DNS server does not support EDNS using rules from RFC 6891 [12]
 o Source tree has been reorganized to use a more modern layout [13]
 o Allow parsing of CAA Resource Record [14]

Bug fixes:
 o readaddrinfo bad sizeof() [1]
 o Test cases should honor HAVE_WRITEV flag, not depend on WIN32 [6]
 o FQDN with trailing period should be queried first [7]
 o ares_getaddrinfo() was returning members of the struct as garbage values if
   unset, and was not honoring ai_socktype and ai_protocol hints. [8] [9]
 o ares_gethostbyname() with AF_UNSPEC and an ip address would fail [11]
 o Properly document ares_set_local_ip4() uses host byte order [16]

Thanks go to these friendly people for their efforts and contributions:
  @anonymoushelpishere
  Anthony Penniston (@apenn-msft)
  Brad House (@bradh352)
  Bulat Gaifullin (@bgaifullin)
  Daniela Sonnenschein (@lxdicted)
  Daniel Stenberg (@bagder)
  David Hotham (@dimbleby)
  Fionn Fitzmaurice (@fionn)
  Gisle Vanem (@gavenm)
  Ivan Baidakou (@basiliscos)
  Jonathan Maye-Hobbs (@wheelpharoah)
  Łukasz Marszał (@lmarszal)
  lutianxiong (@ltx2018)
  Seraphime Kirkovski (@Seraphime)
(14 contributors)

References to bug reports and discussions on issues:
 [1] = https://github.com/c-ares/c-ares/pull/331
 [2] = https://github.com/c-ares/c-ares/pull/332
 [3] = https://github.com/c-ares/c-ares/issues/333
 [4] = https://github.com/c-ares/c-ares/pull/334
 [5] = https://github.com/c-ares/c-ares/pull/336
 [6] = https://github.com/c-ares/c-ares/pull/344
 [7] = https://github.com/c-ares/c-ares/pull/345
 [8] = https://github.com/c-ares/c-ares/issues/343
 [9] = https://github.com/c-ares/c-ares/issues/317
 [10] = https://github.com/c-ares/c-ares/pull/346
 [11] = https://github.com/c-ares/c-ares/pull/204
 [12] = https://github.com/c-ares/c-ares/pull/244
 [13] = https://github.com/c-ares/c-ares/pull/349
 [14] = https://github.com/c-ares/c-ares/pull/360
 [15] = https://github.com/c-ares/c-ares/pull/367
 [16] = https://github.com/c-ares/c-ares/pull/368
 [17] = https://github.com/c-ares/c-ares/issues/371