ignore unknown metadata messages

ChangeLog

@@ -80,6 +80,10 @@
 	* added session::is_dht_running() function
 	* added torrent_handle::force_dht_announce()
 
+release 0.14.8
+
+	* ignore unkown metadata messages
+
 release 0.14.7
 
 	* fixed deadlock in natpmp

src/ut_metadata.cpp

@@ -355,9 +355,7 @@ namespace libtorrent { namespace
 				}
 				break;
 			default:
-				{
-					m_pc.disconnect(error_code(errors::invalid_metadata_message, libtorrent_category), 2);
-				}
+				// unknown message, ignore
 			}
 			return true;
 		}