*) Feature: now maximum error logging rate can be limited with the
   "rate" parameter of the "error_log" directive; by default the

   is 1000 messages per second.

*) Bugfix: in resolver.
   Thanks to Kirill A. Korinsky.

*) Bugfix: the "proxy_no_cache" directive was not checked when

   errors.

*) Bugfix: a block used in the "stub" parameter of the "include" SSI
   directive might be sent twice.