nginx-0.3.52-RELEASE import

nginx-0.3.52-RELEASE import

    *) Change: the ngx_http_index_module behavior for the "POST /" requests
       is reverted to the 0.3.40 version state: the module now does not
       return the 405 error.

    *) Bugfix: the worker process may got caught in an endless loop if the
       limit rate was used; the bug had appeared in 0.3.37.

    *) Bugfix: ngx_http_charset_module logged "unknown charset" alert, even
       if the recoding was not needed; the bug had appeared in 0.3.50.

    *) Bugfix: if a code response of the PUT request was 409, then a
       temporary file was not removed.