connectd: setup chainparams

We are going to signal the genesis block hash in the init message.

connectd/connect_wire.csv

@@ -4,6 +4,7 @@
 #include <lightningd/gossip_msg.h>
 
 msgtype,connectctl_init,2000
+msgdata,connectctl_init,chainparams,chainparams,
 msgdata,connectctl_init,id,node_id,
 msgdata,connectctl_init,num_wireaddrs,u16,
 msgdata,connectctl_init,wireaddrs,wireaddr_internal,num_wireaddrs

connectd/connectd.c

@@ -1145,6 +1145,7 @@ static struct io_plan *connect_init(struct io_conn *conn,
 	/* Fields which require allocation are allocated off daemon */
 	if (!fromwire_connectctl_init(
 		daemon, msg,
+		&chainparams,
 		&daemon->id,
 		&proposed_wireaddr,
 		&proposed_listen_announce,