['No Accept-Encoding sent by client', 'compression is disabled because no suitable configuration was found', 'Server not configured to compress 1.0 requests', 'Server not configured to compress proxy requests', 'No compression scheme matches for this extension/Accept-Encoding', 'Unknown error', 'Server not configured to compress range requests', 'File smaller than compression threshold', 'File encrypted', 'Compressed copy does not exist', 'Compressed copy out of date', 'Server not configured to compress content-Type for this extension', 'Document footer enabled for static files', 'Url has not been requested frequently enough to justify compression', 'Compressed copy could not be created']