Compression as a user option (fixes #446)

cmd/syncthing/gui.go

@@ -288,6 +288,7 @@ func restPostConfig(m *model.Model, w http.ResponseWriter, r *http.Request) {
 			nm := newCfg.NodeMap()
 			for k := range om {
 				if _, ok := nm[k]; !ok {
+					// A node was removed and another added
 					configInSync = false
 					break
 				}

cmd/syncthing/main.go

@@ -654,7 +654,7 @@ next:
 					wr = &limitedWriter{conn, rateBucket}
 				}
 				name := fmt.Sprintf("%s-%s", conn.LocalAddr(), conn.RemoteAddr())
-				protoConn := protocol.NewConnection(remoteID, conn, wr, m, name)
+				protoConn := protocol.NewConnection(remoteID, conn, wr, m, name, nodeCfg.Compression)
 
 				l.Infof("Established secure connection to %s at %s", remoteID, name)
 				if debugNet {