Changes with nginx 0.8.21 26 Oct 2009

    *) Feature: now the "-V" switch shows TLS SNI support.

    *) Feature: the "listen" directive of the HTTP module supports unix
       domain sockets.
       Thanks to Hongli Lai.

    *) Feature: the "default_server" parameter of the "listen" directive.

    *) Feature: now a "default" parameter is not required to set listen
       socket options.

    *) Bugfix: nginx did not support dates in 2038 year on 32-bit platforms;

    *) Bugfix: socket leak; the bug had appeared in 0.8.11.