Added option to specify length of base64 output.

Based on a patch posted to the list by Richard Michael.
Added support for --help and --version options.
Fixed version output.
Added a cont to specify base64 line wrap.
http_negotiate.c: fix several SPNEGO memory handling issues
Another small output fix for --help and --version.
Updated copyright date.
easy: Fix the broken CURLOPT_MAXCONNECTS option

Copy the CURLOPT_MAXCONNECTS option to CURLMOPT_MAXCONNECTS in
curl_easy_perform().

Bug: http://curl.haxx.se/bug/view.cgi?id=1212
Reported-by: Steven Gu
http_negotiate.c: follow-up for commit 3dcc1a9c
--engine: spellfix the help message

Reported by: Fredrik Thulin
easy.c: fix compiler warning
lib1509.c: fix compiler warnings
sockfilt.c: Added wrapper functions to fix Windows console issues

The new read and write wrapper functions support reading from stdin
and writing to stdout/stderr on Windows by using the appropriate
Windows API functions and data types.
Curl_open: restore default MAXCONNECTS to 5

At some point recently we lost the default value for the easy handle's
connection cache, and this change puts it back to 5 - which is the
former default value and it is documented in the curl_easy_setopt.3 man
page.
examples/multi-single.c: fix the order of destructions

... so that it adheres to the API documentation.

Reported by: Tomas Mlcoch
curl_global_init.3: improve description of CURL_GLOBAL_ALL

Reported by: Tomas Mlcoch
sockfilt.c: Fixed handling of multiple fds being signaled
RELEASE-NOTES: synced with 5e722b2d09087

3 more bug fixes, 6 more contributors
util.c: Made write_pidfile write the correct PID on MinGW/Msys

This workaround fixes an issue on MinGW/Msys regarding the Perl
testsuite scripts not being able to signal or control the server
processes. The MinGW Perl runtime only sees the Msys processes and
their corresponding PIDs, but sockfilt (and other servers) wrote the
Windows PID into their PID-files. Since this PID is useless to the
testsuite, the write_pidfile function was changed to search for the
Msys PID and write that into the PID-file.
cpp: use #ifdef __MINGW32__ to avoid compiler complaints

... instead of just #if