Changes with nginx 1.7.6                                         30 Sep 2014

    *) Change: the deprecated "limit_zone" directive is not supported
       anymore.

    *) Feature: the "limit_conn_zone" and "limit_req_zone" directives now
       can be used with combinations of multiple variables.

    *) Bugfix: request body might be transmitted incorrectly when retrying a
       FastCGI request to the next upstream server.

    *) Bugfix: in logging to syslog.