lightningd: update bolts to clarify channel_update timing.

Signed-off-by: Rusty Russell <[email protected]>

Author: rustyrussell

Makefile

@@ -26,7 +26,7 @@ CCANDIR := ccan
 
 # Where we keep the BOLT RFCs
 BOLTDIR := ../bolts/
-DEFAULT_BOLTVERSION := e0b1200ffa4220f3db6d518aa322f97e0a30cc1f
+DEFAULT_BOLTVERSION := 0809f77c7b57abe138c02697f573b52b470fb647
 # Can be overridden on cmdline.
 BOLTVERSION := $(DEFAULT_BOLTVERSION)
 

lightningd/channel_gossip.c

@@ -295,7 +295,9 @@ static void send_private_cupdate(struct channel *channel, bool even_if_redundant
 	 *
 	 * - MAY create a `channel_update` to communicate the channel
 	 *   parameters to the channel peer, even though the channel has not
-	 *   yet been announced (i.e. the `announce_channel` bit was not set).
+	 *   yet been announced (i.e. the `announce_channel` bit was not set
+	 *   or the `channel_update` is sent before the peers exchanged
+	 *   [announcement signatures](#the-announcement_signatures-message)).
 	 *    - MUST set the `short_channel_id` to either an `alias` it has
 	 *    received from the peer, or the real channel `short_channel_id`.
 	 *    - MUST set `dont_forward` to 1 in `message_flags`