Remove unneeded addrinfo flag which doesn't exist on MacOS.

btpd/net.c

@@ -692,7 +692,7 @@ net_init(void)
     char portstr[6];
     struct addrinfo hints, *res, *ai;
     bzero(&hints, sizeof(hints));
-    hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE | AI_NUMERICSERV;
+    hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
     hints.ai_family = net_af_spec();
     hints.ai_socktype = SOCK_STREAM;
     snprintf(portstr, sizeof(portstr), "%hd", net_port);