Factored out unslashquote. Added some 'const's in function parameters.

145 - Phil Blundell's CURLOPT_SCOPE patch/work

  parser to allow numerical IPv6-addresses to be specified with the scope
  given, as per RFC4007 - with a percent letter that itself needs to be URL
  escaped. For example, for an address of fe80::1234%1 the HTTP URL is:
  "http://[fe80::1234%251]/"

147 - PHP's bug report #43158 (http://bugs.php.net/bug.php?id=43158) identifies
      a true bug in libcurl built with OpenSSL.

  true bug in libcurl built with OpenSSL. It made curl_easy_getinfo() more or
  less always return 0 for CURLINFO_SSL_VERIFYRESULT because the function that
  would set it to something non-zero would return before the assign in almost
  all error cases. The internal variable is now set to non-zero from the start
  of the function only to get cleared later on if things work out fine.

during redirects.  Test cases 1052 and 1055 show problems (maybe the same
root cause as 1051) and are disabled.

Keep the '#' character as the first one on the line.

by Ben Sutcliffe.  The test when run manually shows a problem in curl,
but the test harness web server doesn't run the test correctly so it's
disabled for now.

including our local m4/reentrant.m4 file. This even takes care of including the
file in the distribution tarball.

Set SED for Solaris to gsed if available.

and OS/2.

Added #148 and # 149

  server using the multi interface, the commands are not being sent correctly
  and instead the connection is "cancelled" (the operation is considered done)
  prematurely. There is a half-baked (busy-looping) patch provided in the bug
  report but it cannot be accepted as-is. See
  http://curl.haxx.se/bug/view.cgi?id=2006544

146 - Yehoshua Hershberg's re-using of connections that failed with
      CURLE_PEER_FAILED_VERIFICATION

147 - PHP's bug report #43158 (http://bugs.php.net/bug.php?id=43158) identifies
      a true bug in libcurl built with OpenSSL.

OpenSSL.

reentrant.m4 and remove reentrant.m4 before calling aclocal.

address in an IPv6 capable libcurl.

This quadigraph used before a C preprocessor 'define' directive could
be fooling M4, when processing this file, and make it think that the
line contains a pure M4 'define' macro.

in top Makefile.am triggered a problem that prevented aclocal from running
successfully on SunOS 5.10 with GNU m4 1.4.5 and GNU Autoconf 2.61

A tarball which reproduces mentioned problem is the one dated July-28-2008
http://cool.haxx.se/curl-daily/curl-7.19.0-20080728.tar.gz

We actually don't need all the bells and whistles that the above mechanism
provides. We only need to include our m4/reentrant.m4 file in acinclude.m4
so here we go with this simpler mechanism.