Fix two CHANGES typos and remove whitespace

     Workaround for http: when forwarding partial file buckets to keep the

     output filter from closing these too early. [Stefan Eissing]

  *) mod_http2: elimination of fixed master connectin buffer for TLS 

  *) mod_http2: elimination of fixed master connection buffer for TLS 

     connections. New scratch bucket handling optimized for TLS write sizes. 

     File bucket data read directly into scratch buffers, avoiding one

     copy. Non-TLS connections continue to pass buckets unchanged to the core

  *) mod_http2: new "bucket beam" technology to transport buckets across

     threads without buffer copy. Delaying response start until flush or

     enough body data has been accumulated. Overall significanlty smaller

     enough body data has been accumulated. Overall significantly smaller

     memory footprint. [Stefan Eissing]

  *) core: New CGIVar directive can configure REQUEST_URI to represent the