Changes with nginx 1.0.13 05 Mar 2012

*) Feature: the "return" and "error_page" directives can now be used to
return 307 redirections.

*) Bugfix: a segmentation fault might occur in a worker process if the
"resolver" directive was used and there was no "error_log" directive
specified at global level.
Thanks to Roman Arutyunyan.

*) Bugfix: memory leaks.
Thanks to Lanshun Zhou.

*) Bugfix: nginx might log incorrect error "upstream prematurely closed
connection" instead of correct "upstream sent too big header" one.
Thanks to Feibo Li.

*) Bugfix: on ZFS filesystem disk cache size might be calculated
incorrectly; the bug had appeared in 1.0.1.

*) Bugfix: the number of internal redirects to named locations was not
limited.

*) Bugfix: temporary files might be not removed if the "proxy_store"
directive was used with SSI includes.

*) Bugfix: in some cases non-cacheable variables (such as the $args
variable) returned old empty cached value.

*) Bugfix: the "proxy_redirect" directives might be inherited
incorrectly.

*) Bugfix: nginx could not be built with the ngx_http_perl_module if the
--with-openssl option was used.

*) Bugfix: nginx could not be built by the icc 12.1 compiler.