Changes with nginx 0.8.44 05 Jul 2010
*) Change: now nginx does not cache by default backend responses, if they have a "Set-Cookie" header line.
*) Feature: the "listen" directive supports the "setfib" parameter. Thanks to Andrew Filonov.
*) Bugfix: the "sub_filter" directive might change character case on partial match.
*) Bugfix: compatibility with HP/UX.
*) Bugfix: compatibility with AIX xcl_r compiler.
*) Bugfix: nginx treated a large SSLv2 packets as plain requests. Thanks to Miroslaw Jaworski.