Based-on-patch-by: Jim Hollinger

Closes #389
Closes #386

Visual Studio complains with a message box:

"Run-Time Check Failure #1 - A cast to a smaller data type has caused a
loss of data.  If this was intentional, you should mask the source of
the cast with the appropriate bitmask.

For example:
char c = (i & 0xFF);

Changing the code in this way will not affect the quality of the
resulting optimized code."

This is because only 'val' is cast to unsigned char, so the "& 0xff" has
no effect.

Closes #387

- Clarify that FILE and SCP are disabled by default since 7.19.4
- Add that SMB and SMBS are disabled by default since 7.40.0
- Add CURLPROTO_SMBS to the list of protocols

find . -name .gitignore -print0 | xargs -i -0 sort -o '{}' '{}'

... and changed "oriented" to "related"

Closes #378

Acknowledge that SSLv3 is also widely considered to be insecure.

Also, provide references for people who want to know more about why it's
insecure.

Fix the check code to pass 5 arguments instead of 6.  This typo was
introduced by commit aebfd4cf (cmake: fix gethostby{addr,name}_r in
CurlTests, 2014-10-31).

Bug: https://github.com/bagder/curl/pull/379
Reported-by: Daniel Seither

Bug: http://curl.haxx.se/mail/lib-2015-08/0016.html
Reported-by: Eric Ridge

"can not" => "cannot"

closes #377

closes #376

Closes #375

Closes #374

Return 0 instead of NGHTTP2_ERR_CALLBACK_FAILURE if we can't locate the
SessionHandle. Apparently mod_h2 will sometimes send a frame for a
stream_id we're finished with.

Use nghttp2_session_get_stream_user_data and
nghttp2_session_set_stream_user_data to identify SessionHandles instead
of a hash.

Closes #372

closes #371

This reverts commit e6749055.

... since libidn has since been fixed.

Otherwise the build only pretended to use GSS-API

Closes #370

Reported-by: Tim Stack

Closes #359

... since it went old and thus was expired and caused the test to fail!

Added support for generating the full man page based on code from
generate.bat.

To allow for the full generation of tool_hugehelp.c added detection of
the required programs - based on code from generate.bat.

Rather than duplicate future variables, during clean-up of both success
and error conditions, use a common function that can be called by both.