Reviewing fields being free'd in free_config_fields() still pending

Additionally some code reorganization and direct OOM handling fixes,
just another step towards fixing curl tool issues uncovered 2011-09-15

Additionally fix data type of result vars for iconv() calls

Re-enabling MemoryTracking capability on 'src' subdirectory files and torture
tests have uncovered many issues which were going unnoticed in curl tool. So
here we go fixing some of them. Others still remain and should be addressed
ASAP, given that curl tool is used in our test harness also for test server
start verification purposes. There are even non-socket file descriptor leaks.

Use same preprocessor logic for curl tool MemoryTracking activation in source
files located in 'src' subdirectory as the one used for libcurl sources.

A custom HTTP header ending in a semicolon instead of a colon
will be treated as a header to be added without any data
portion.

With this fix, it should work for PolarSSL-1.0.0 (and SVN-1091 trunk)
and retain compatibility with earlier versions. (Tested with 0.14.1)

PolarSSL still doesn't play nicely with curl's CA bundle (we discussed
this before) but I was at least able to retrieve the
https://www.gmail.com/ login page using a modified ca-certificates.crt
file with all 3 versions of PolarSSL.

Reported by: Jeff Pohlmeyer

Also fix inappropriate error handling when sending ftp EPRT or PORT commands.

Zero-copy and "Avoid having to remove/readd handles" are not really
features we think are worthwhile to add. Removed.

SRP features have been added already, removed.

11.9 IPv6 addresses with globbing added

There's three pending bug fixes but there's no time left so let's
try to get them fixed for next release...

https, ftps and ssh servers allowed start up time back to previous values

Five more bugfixes, one more contributor

Renamed the variable from 'proto' to 'level' simply because it is not
protocol you set but level and that is the name of the argument used in
man pages and the POSIX documentation of the setsockopt function.

This workarounds old libssh2 versions not properly initializing
some ssh session variables, which would trigger memory debuggers
warnings on memory being used without having been initialized.

The current version of speedcheck.c may disable timeout by setting zero
to Curl_expire. Which is fine using the curl_multi_perform, because it
recheck all timeout internals, but when using custom event poller (like
hiperfifo.c) it may keep stalle connection forever.