Changes with nginx 1.3.14 05 Mar 2013

*) Feature: $connections_active, $connections_reading, and
$connections_writing variables in the ngx_http_stub_status_module.

*) Feature: support of WebSocket connections in the
ngx_http_uwsgi_module and ngx_http_scgi_module.

*) Bugfix: in virtual servers handling with SNI.

*) Bugfix: new sessions were not always stored if the "ssl_session_cache
shared" directive was used and there was no free space in shared
memory.
Thanks to Piotr Sikora.

*) Bugfix: multiple X-Forwarded-For headers were handled incorrectly.
Thanks to Neal Poole for sponsoring this work.

*) Bugfix: in the ngx_http_mp4_module.
Thanks to Gernot Vormayr.