revlog: add 'raw' argument to revision and _addrevision This patch introduces a new 'raw' argument (defaults to False) to revlog's revision() and _addrevision() methods. When the 'raw' argument is set to True, it indicates the revision data should be handled as raw data by the flagprocessor. Note: Given revlog.addgroup() calls are restricted to changegroup generation, we can always set raw to True when calling revlog._addrevision() from revlog.addgroup().