connectd: allow --addr=/socket

It's supposed to be `--bind-addr=/socket` since you can't advertize a
local address, but the parser accepts `--addr=` too, and the intent is
clear.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

connectd/connectd.c

@@ -993,8 +993,8 @@ static struct wireaddr_internal *setup_listeners(const tal_t *ctx,
 			status_trace("Created socket listener on file %s",
 				     addrun.sun_path);
 			add_listen_fd(daemon, fd, false);
-			/* We don't announce socket names */
-			assert(!announce);
+			/* We don't announce socket names, though we allow
+			 * them to lazily specify --addr=/socket. */
 			add_binding(&binding, &wa);
 			continue;
 		case ADDR_INTERNAL_AUTOTOR: