dispatcher: fix force send socket functionality, was not working in some TCP scenarios

src/modules/dispatcher/dispatch.c

@@ -1869,7 +1869,8 @@ static inline int ds_push_dst(
 			break;
 	}
 	if(sock) {
-		msg->force_send_socket = sock;
+		LM_DBG("set send socket to %.*s\n", sock->sock_str.len, sock->sock_str.s);
+		set_force_socket(msg, sock);
 	}
 	return 0;
 }