Added CURLOPT_TRANSFER_ENCODING as the option to set to request Transfer
Encoding in HTTP requests (if built zlib enabled). I also renamed
CURLOPT_ENCODING to CURLOPT_ACCEPT_ENCODING (while keeping the old name
around) to reduce the confusion when we have to encoding options for
HTTP.

--tr-encoding is now the new command line option for curl to request
this, and thus I updated the test cases accordingly.

When TE: is inserted in the request, we must add a "Connection: TE" as
well to be HTTP 1.1 compliant. If a custom Connection: header is passed
in, we must use that and only append TE to it. Test case 1125 verifies
TE: + custom Connection:.

Since this struct member is used in the code to determine what and how
to decode automatically and since it is now also used for compressed
Transfer-Encodings, I renamed it to the more suitable 'auto_decoding'

Transfer-Encoding differs from Content-Encoding in a few subtle ways,
but primarily it concerns the transfer only and not the content so when
discovered to be compressed we know we have to uncompress it. There will
only arrive compressed transfers in a response after we have requested
them with the appropriate TE: header.

Test case 1122 and 1123 verify.

Fix OS400 LDAP wrappers: strings were non null-terminated.

curl-config --version didn't output the correct version string (bug
introduced in commit 0355e33b), and unfortunately the test
case 1022 that was supposed to check for this was broken.

This change fixes the test to detect this problem and it fixes the
output.

Bug: http://curl.haxx.se/bug/view.cgi?id=3288727

Clarified the release procedure

As we're closing in on the release, I give up on the remaining ones but
I leave them in here for now to try to fix for next release.

I removed the 281 issue about warnings from the statical analyzer scans,
as they seem to be mostly false positives at this point.

When going back from SSL, put the send/recv function pointers back to
the plain versions.

Bug: http://curl.haxx.se/mail/lib-2011-04/0070.html
Reported by: Mehmet Bozkurt

Error 4 has got a meaning

Error 48 has got a slightly different meaning now

The script didn't properly add the -lssh2 link option when it enabled
libssh2 linking where pkg-config isn't found.

Reported by: Saqib Ali
Bug: http://curl.haxx.se/mail/lib-2011-04/0054.html

When checking if an existing RTSP connection is alive or not, the
checkconnection function might be called with a SessionHandle pointer
being NULL and then referenced causing a crash. This happened only using
the multi interface.

Reported by: Tinus van den Berg

Bug: http://curl.haxx.se/bug/view.cgi?id=3280739

When using -O the file will be saved in the current directory, and this
is now spelled out clearly.

Allow openSSL without SSL2 to be used. This fix is inspired by the fix
provided by Cristian Rodrguez.

Reported by: Cristian Rodrguez

Reported by: Hongli Lai

In case a client certificate is used, invalidate SSL session cache
at the end of a session.  This forces NSS to ask for a new client
certificate when connecting second time to the same host.

Bug: https://bugzilla.redhat.com/689031

When I decided to search for a potential error with the cacert bundle it
struck me I wanted to see the full source URL in the output...

* Rename the object object directory from 'objs' to 'BCC_obj' to be in
 sync with my previous patch for lib/Makefile.b32.

* Turn off these warnings to keep the build totally silent (with CBuilder-6
 that is).
  -w-inl    8026 Functions X are not expanded inline.
  -w-pia   8060 Possibly incorrect assignment
  -w-pin  8061 Initialization is only partially bracketed
 (same added in src/Makefile.b32)

* $(MKDIR) and $(RMDIR) have been replaced with the shell-commands 'md'
 and 'rd'. When having MingW/Msys programs 'mkdir.exe' and 'rmdir.exe' in
$PATH, this confuses Borland's make and the result (the cleaning etc.) would
 not be as expected.

* Removed the preprocessing step; no need for PP_CMD and the .int files.
 curl.exe builds fine w/o and the makefile gets simpler.

* Added a target for creating a compressed hugehelp.c if WITH_ZLIB is  defined.
It assumes groff, gzip and perl is available if such an "advanced"  users
requests it. Okay? BTW. My groff and Perl needs unix-slashes ('/').
 Other perls should handle both forms ('/' and '\').

* Rename the object object directory from 'objs' to 'BCC_obj'. I feel
 it should be named properly. Ref. Makefile.Watcom where it's called
 'WC_Win32.obj'.

* Turn off these warnings to keep the build totally silent (with CBuilder-6
 that is).
  -w-inl    8026 Functions X are not expanded inline.
  -w-pia   8060 Possibly incorrect assignment
  -w-pin  8061 Initialization is only partially bracketed

I'm sure the warnings could be fixed the "proper" way or with some added
"#pragma" statements. But that just clutters the sources IMHO.

* $(MKDIR) and $(RMDIR) have been replaced with the shell-commands 'md'
 and 'rd'. When having MingW/Msys programs 'mkdir.exe' and 'rmdir.exe' in
$PATH, this confuses Borland's make and the result (the cleaning etc.) would
 not be as expected.

* Added a ".path.int = $(OBJDIR)" to tell make where the $(PREPROCESSED)
 files are. Why we need the preprocess step in the fist place is beyond me
(Yang?). But I'll leave that for now.

These problems have gotten no interest/feedback from users:

-275 - Introduce a way to avoid sending USER for FTP connections
-288 - bug 3219997 curl rtmp request curl: (55) select/poll returned error

This problem is rather an autoconf bug with little user interest and it
can be worked around with an older autoconf:

-278 - "Configure  $as_echo does not work"

This problem is not fixed:

-286 - bug 3214223 Pipelined HTTP requests with a zero-length body broken

Also add test case 584 for the same

Bug: http://curl.haxx.se/bug/view.cgi?id=3214223

This hasn't show the version number correctly since the $VERSION change
in the configure, and now it works again.

Also, fixed Curl_proxyCONNECT() stub with HTTP disabled.