nginx 1.1.12释出，圣诞节也不安生

Changes with nginx 1.1.12                                        26 Dec 2011

*) Change: a "proxy_pass" directive without URI part now uses changed
URI after redirection with the "error_page" directive;
Thanks to Lanshun Zhou.

*) Feature: the "proxy/fastcgi/scgi/uwsgi_cache_lock",
"proxy/fastcgi/scgi/uwsgi_cache_lock_timeout" directives.

*) Feature: the "pcre_jit" directive.

*) Feature: the "if" SSI command supports captures in regular
expressions.

*) Bugfix: the "if" SSI command did not work inside the "block" command.

*) Bugfix: the "limit_conn_log_level" and "limit_req_log_level"
directives might not work.

*) Bugfix: the "limit_rate" directive did not allow to use full
throughput, even if limit value was very high.

*) Bugfix: the "sendfile_max_chunk" directive did not work, if the
"limit_rate" directive was used.

*) Bugfix: a "proxy_pass" directive without URI part always used
original request URI if variables were used.

*) Bugfix: a "proxy_pass" directive without URI part might use original
request after redirection with the "try_files" directive;
Thanks to Lanshun Zhou.

*) Bugfix: in the ngx_http_scgi_module.

*) Bugfix: in the ngx_http_mp4_module.

*) Bugfix: nginx could not be built on Solaris; the bug had appeared in
1.1.9.