*) refactor ngx_palloc()
*) introduce ngx_pnalloc()
*) additional pool blocks have smaller header

    *) Workaround: for bug in FreeBSD kqueue.

    *) Bugfix: now a response generated by the "post_action" directive is
       not transferred to a client.

    *) Bugfix: the memory leaks were occurring if many log files were used.

    *) Bugfix: the first "proxy_redirect" directive was working inside one
       location.

    *) Bugfix: on 64-bit platforms segmentation fault may occurred on start
       if the many names were used in the "server_name" directives; the bug
       had appeared in 0.3.18.

    *) Bugfix: nginx did run on Linux parisc.

    *) Feature: nginx now does not start under FreeBSD if the sysctl
       kern.ipc.somaxconn value is too big.

    *) Bugfix: if a request was internally redirected by the
       ngx_http_index_module module to the ngx_http_proxy_module or
       ngx_http_fastcgi_module modules, then the index file was not closed
       after request completion.

    *) Feature: the "proxy_pass" can be used in location with regular
       expression.

    *) Feature: the ngx_http_rewrite_filter_module module supports the
       condition like "if ($HTTP_USER_AGENT ~ MSIE)".

    *) Bugfix: nginx started too slow if the large number of addresses and
       text values were used in the "geo" directive.

    *) Change: a variable name must be declared as "$name" in the "geo"
       directive. The previous variant without "$" is still supported, but
       will be removed soon.

    *) Feature: the "%{VARIABLE}v" logging parameter.

    *) Feature: the "set $name value" directive.

    *) Bugfix: gcc 4.0 compatibility.

    *) Feature: the --with-openssl-opt=OPTIONS autoconfiguration directive.

    *) Change: the ngx_http_rewrite_module was rewritten from the scratch.
       Now it is possible to redirect, to return the error codes, to check
       the variables and referrers. The directives can be used inside
       locations. The redirect directive was canceled.

    *) Feature: the ngx_http_geo_module.

    *) Feature: the proxy_set_x_var and fastcgi_set_var directives.

    *) Bugfix: the location configuration with "=" modifier may be used in
       another location.

    *) Bugfix: the correct content type was set only for requests that use
       small caps letters in extension.

    *) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the
       location, and access was denied, and the error was redirected to a
       static page, then the segmentation fault occurred.

    *) Bugfix: if in a proxied "Location" header was a relative URL, then a
       host name and a slash were added to them; the bug had appeared in
       0.1.14.

    *) Bugfix: the system error message was not logged on Linux.