avoids extra dynamic allocation

... by using plain structs instead of pointers for the connection cache,
we can avoid several dynamic allocations that weren't necessary.

This ensures an alternate address is not used.
Does not apply to proxy tunnel.

- Document option RTLIBCFG (runtime library configuration).

Bug: https://github.com/bagder/curl/issues/254
Reported-by: Bert Huijben

Use text mode when cygwin to eliminate trailing carriage returns.

Bug: https://github.com/bagder/curl/pull/258

Reported-by: Liviu Chircu

Reported-by: Fred Stluka
Bug: https://github.com/bagder/curl/issues/255

Also print the revocation reason if appropriate.

The symbol is fairly new.

Reported-by: Kamil Dudka

The OpenSSL trace callback is wonderfully undocumented but given a
journey in the source code, it seems the cases were ssl_ver is zero
doesn't follow the same pattern and thus turned out confusing and
misleading. For now, we skip doing any CURLINFO_TEXT logging on those
but keep sending them as CURLINFO_SSL_DATA_OUT/IN.

Also, I added direction to the text info and I edited some functions
slightly.

Bug: https://github.com/bagder/curl/issues/219
Reported-by: Jay Satiro, Ashish Shukla

https://github.com/bagder/curl/issues/244

Commit 145c263a changed the behavior when Curl_read_plain returns
CURLE_AGAIN. We now handle CURLE_AGAIN and SEC_I_CONTEXT_EXPIRED
correctly.

Commit: https://github.com/bagder/curl/commit/926cb9f
Reported-by: Ray Satiro

The missing file has not been autogenerated because a temporary fix was
employed in acinclude.m4 which blocked update. Removed that fix and a recent
version of missing is copied to build root.

test(1) on HP-UX requires a single equals sign and fails with two.
Let's use one and make every OS happy.

Reported-By: Michael Osipov

That option is not mentioned in the man page of libtoolize 2.4.4.19-fda4.
Moveover, a comment in line 2623 says "--automake is for 1.5 compatibility".

This option is redundant now.

- update default versions of dependencies (except for rare/old platforms)
- update urls
- sync examples makefiles with main ones
- remove line ending space

* install-sh is always regenerated
* mkinstalldirs was already redudant years ago. Automake uses install for
  that. See: http://lists.gnu.org/archive/html/automake/2007-03/msg00015.html

Bug born in changes made several days ago 9a91e805.

Bug: http://curl.haxx.se/mail/lib-2015-04/0199.html
Reported-by: Brian Chrisman

Bug: http://curl.haxx.se/mail/lib-2015-04/0191.html
Reported-by: Michael Osipov

This fixes using a multi-target mingw distro to build curl .dll for the
non-default target.
(mirroring the same patch present in src/makefile.m32)

I've not mentioned the bug fixes that were shipped in 7.42.1 from the
7_42 branch.

Make the HTTP headers separated by default for improved security and
reduced risk for information leakage.

Bug: http://curl.haxx.se/docs/adv_20150429.html
Reported-by: Yehezkel Horowitz, Oren Souroujon

* Add new options, CURLOPT_PROXY_SERVICE_NAME and CURLOPT_SERVICE_NAME.
* Add new curl options, --proxy-service-name and --service-name.

So that it fits HTTP/2 as well