elements: Tell closingd in which network it is running

Signed-off-by: Christian Decker <decker.christian@gmail.com>

closingd/closing_wire.csv

@@ -5,6 +5,7 @@
 msgtype,closing_init,2001
 msgdata,closing_init,chain_hash,chain_hash,
 msgdata,closing_init,pps,per_peer_state,
+msgdata,closing_init,chain_hash,bitcoin_blkid,
 msgdata,closing_init,funding_txid,bitcoin_txid,
 msgdata,closing_init,funding_txout,u16,
 msgdata,closing_init,funding_satoshi,amount_sat,

closingd/closingd.c

@@ -612,6 +612,7 @@ int main(int argc, char *argv[])
 	/* stdin == requests, 3 == peer, 4 = gossip, 5 = gossip_store, 6 = hsmd */
 	per_peer_state_set_fds(pps, 3, 4, 5);
 	chainparams = chainparams_by_chainhash(&chain_hash);
+	is_elements = chainparams->is_elements;
 
 	status_debug("out = %s/%s",
 		     type_to_string(tmpctx, struct amount_sat, &out[LOCAL]),

lightningd/closing_control.c

@@ -8,6 +8,7 @@
 #include <errno.h>
 #include <gossipd/gen_gossip_wire.h>
 #include <inttypes.h>
+#include <lightningd/bitcoind.h>
 #include <lightningd/chaintopology.h>
 #include <lightningd/channel.h>
 #include <lightningd/closing_control.h>