command line.

hogs Windows machines when libcurl is being used multi-threaded (with > ~50
threads). Andrew Fuller helped us verify and test this.

According to a MSDN web page on connect(), it returns 0 when the connect
is done and thus we don't need the getsockopt() call anyway on Windows.

the patches already applied. No need to apply any patches manually anymore.

ares 1.1.1 is still compatible.

This cures the problem reported by Giuseppe Attardi on October 12, 2003.

(http://bugs.debian.org/212086). Patch by Domenico Andreoli.

multiple DNS lookups can run simultaneously faster. The downside is that
resolving the same host name now can be made at once from multiple threads,
but the upside is that threads now don't alwys have to wait for the others'
resolves. Test case 506 updated accordingly.

an HTTP download, then reset CURLOPT_RESUME_FROM to 0, the next download still
has a Range header with a garbage value." bug report #820502

  addresses, if one of them fails (ipv4-code).