message: Fix gzip docs
  Either ... and ... is wrong (and not what was meant).
diff: @@ -34,7 +34,7 @@ How it works
  ------------
  When gzip filter is enabled, request and response headers are inspected to
  determine whether or not the content should be compressed. The content is
  -compressed and then sent to the client with the appropriate headers if either
  +compressed and then sent to the client with the appropriate headers, if
  response and request allow.
  By *default* compression will be *skipped* when:
  