opts: 4 more options with stand-alone man pages

diff --git a/docs/libcurl/opts/CURLOPT_IOCTLDATA.3 b/docs/libcurl/opts/CURLOPT_IOCTLDATA.3
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+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at http://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_IOCTLDATA 3 "16 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_IOCTLDATA \- custom pointer passed to I/O callback
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IOCTLDATA, void *pointer);
+.SH DESCRIPTION
+Pass the \fIpointer\fP that will be untouched by libcurl and passed as the 3rd
+argument in the ioctl callback set with \fICURLOPT_IOCTLFUNCTION(3)\fP.
+.SH DEFAULT
+By default, the value of this parameter is NULL.
+.SH PROTOCOLS
+Used with HTTP
+.SH EXAMPLE
+TODO
+.SH AVAILABILITY
+Added in 7.12.3
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
+.SH "SEE ALSO"
+.BR CURLOPT_IOCTLFUNCTION "(3), " CURLOPT_SEEKFUNCTION "(3), "

diff --git a/docs/libcurl/opts/CURLOPT_SEEKDATA.3 b/docs/libcurl/opts/CURLOPT_SEEKDATA.3
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+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at http://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_SEEKDATA 3 "16 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_SEEKDATA \- custom pointer passed to the seek callback
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SEEKDATA, void *pointer);
+.SH DESCRIPTION
+Data \fIpointer\fP to pass to the seek callback function. If you use the
+\fICURLOPT_SEEKFUNCTION(3)\fP option, this is the pointer you'll get as
+input.
+.SH DEFAULT
+If you don't set this, NULL is passed to the callback.
+.SH PROTOCOLS
+HTTP, FTP, SFTP
+.SH EXAMPLE
+.SH AVAILABILITY
+Added in 7.18.0
+.SH RETURN VALUE
+.SH "SEE ALSO"
+.BR CURLOPT_STDERR "(3), " CURLOPT_DEBUGFUNCTION "(3), "

diff --git a/docs/libcurl/opts/CURLOPT_SEEKFUNCTION.3 b/docs/libcurl/opts/CURLOPT_SEEKFUNCTION.3
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+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at http://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_SEEKFUNCTION 3 "16 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_SEEKFUNCTION \- user callback for seeking in input stream
+.SH SYNOPSIS
+.nf
+#include <curl/curl.h>
+
+/* These are the return codes for the seek callbacks */
+#define CURL_SEEKFUNC_OK       0
+#define CURL_SEEKFUNC_FAIL     1 /* fail the entire transfer */
+#define CURL_SEEKFUNC_CANTSEEK 2 /* tell libcurl seeking can't be done, so
+                                    libcurl might try other means instead */
+
+int seek_callback(void *userp, curl_off_t offset, int origin);
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SEEKFUNCTION, seek_callback);
+.SH DESCRIPTION
+Pass a pointer to your callback function, which should match the prototype
+shown above.
+
+This function gets called by libcurl to seek to a certain position in the
+input stream and can be used to fast forward a file in a resumed upload
+(instead of reading all uploaded bytes with the normal read
+function/callback). It is also called to rewind a stream when doing a HTTP PUT
+or POST with a multi-pass authentication method. The function shall work like
+fseek(3) or lseek(3) and it gets SEEK_SET, SEEK_CUR or SEEK_END as argument
+for \fIorigin\fP, although libcurl currently only passes SEEK_SET.
+
+\fIuserp\fP is the pointer you set with \fICURLOPT_SEEKDATA(3)\fP.
+
+The callback function must return \fICURL_SEEKFUNC_OK\fP on success,
+\fICURL_SEEKFUNC_FAIL\fP to cause the upload operation to fail or
+\fICURL_SEEKFUNC_CANTSEEK\fP to indicate that while the seek failed, libcurl
+is free to work around the problem if possible. The latter can sometimes be
+done by instead reading from the input or similar.
+
+If you forward the input arguments directly to fseek(3) or lseek(3), note that
+the data type for \fIoffset\fP is not the same as defined for curl_off_t on
+many systems!
+.SH DEFAULT
+By default, this is NULL and unused.
+.SH PROTOCOLS
+HTTP, FTP, SFTP
+.SH EXAMPLE
+TODO
+.SH AVAILABILITY
+Added in 7.18.0
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
+.SH "SEE ALSO"
+.BR CURLOPT_SEEKDATA "(3), " CURLOPT_IOCTLFUNCTION "(3), "

diff --git a/docs/libcurl/opts/CURLOPT_SOCKOPTFUNCTION.3 b/docs/libcurl/opts/CURLOPT_SOCKOPTFUNCTION.3
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+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at http://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_SOCKOPTFUNCTION 3 "16 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_SOCKOPTFUNCTION \- set callback for setting socket options
+.SH SYNOPSIS
+.nf
+#include <curl/curl.h>
+
+typedef enum  {
+  CURLSOCKTYPE_IPCXN,  /* socket created for a specific IP connection */
+  CURLSOCKTYPE_ACCEPT, /* socket created by accept() call */
+  CURLSOCKTYPE_LAST    /* never use */
+} curlsocktype;
+
+#define CURL_SOCKOPT_OK 0
+#define CURL_SOCKOPT_ERROR 1 /* causes libcurl to abort and return
+                                CURLE_ABORTED_BY_CALLBACK */
+#define CURL_SOCKOPT_ALREADY_CONNECTED 2
+
+int sockopt_callback(void *clientp,
+                     curl_socket_t curlfd,
+                     curlsocktype purpose);
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
+.SH DESCRIPTION
+Pass a pointer to your callback function, which should match the prototype
+shown above.
+
+When set, this callback function gets called by libcurl when the socket has
+been created, but before the connect call to allow applications to change
+specific socket options. The callback's \fIpurpose\fP argument identifies the
+exact purpose for this particular socket:
+
+\fICURLSOCKTYPE_IPCXN\fP for actively created connections or since 7.28.0
+\fICURLSOCKTYPE_ACCEPT\fP for FTP when the connection was setup with PORT/EPSV
+(in earlier versions these sockets weren't passed to this callback).
+
+Future versions of libcurl may support more purposes. libcurl passes the newly
+created socket descriptor to the callback so additional setsockopt() calls can
+be done at the user's discretion.  Return \fICURL_SOCKOPT_OK\fP from the
+callback on success. Return \fICURL_SOCKOPT_ERROR\fP from the callback
+function to signal an unrecoverable error to the library and it will close the
+socket and return \fICURLE_COULDNT_CONNECT\fP.
+
+Alternatively, the callback function can return
+\fICURL_SOCKOPT_ALREADY_CONNECTED\fP, to tell libcurl that the socket is
+already connected and then libcurl will not attempt to connect it. This allows
+an application to pass in an already connected socket with
+\fICURLOPT_OPENSOCKETFUNCTION(3)\fP and then have this function make libcurl
+not attempt to connect (again).
+.SH DEFAULT
+By default, this callback is NULL and unused.
+.SH PROTOCOLS
+All
+.SH EXAMPLE
+TODO
+.SH AVAILABILITY
+Added in 7.16.0. The \fICURL_SOCKOPT_ALREADY_CONNECTED\fP return code was
+added in 7.21.5.
+.SH RETURN VALUE
+CURLE_OK
+.SH "SEE ALSO"
+.BR CURLOPT_SOCKOPTDATA "(3), " CURLOPT_OPENSOCKETFUNCTION "(3), "