BOLT: update to fix gossip pruning quote.

Which I disagreed with, and has been fixed.

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

Makefile

@@ -23,7 +23,7 @@ CCANDIR := ccan
 
 # Where we keep the BOLT RFCs
 BOLTDIR := ../bolts/
-DEFAULT_BOLTVERSION := 341ec844f13c0c0abc4fe849059fbb98173f9766
+DEFAULT_BOLTVERSION := 48fed66e26b80031d898c6492434fa9926237d64
 # Can be overridden on cmdline.
 BOLTVERSION := $(DEFAULT_BOLTVERSION)
 

common/gossip_constants.h

@@ -62,8 +62,8 @@
 /* BOLT #7:
  *
  * A node:
- *   - if a channel's latest `channel_update`s `timestamp` is older than two weeks
- *   (1209600 seconds):
+ * - if the `timestamp` of the latest `channel_update` in
+ *   either direction is older than two weeks (1209600 seconds):
  *     - MAY prune the channel.
  *     - MAY ignore the channel.
  */

gossipd/gossipd.c

@@ -603,8 +603,8 @@ handled:
 /* BOLT #7:
  *
  * A node:
- *  - if a channel's latest `channel_update`s `timestamp` is older than two weeks
- *    (1209600 seconds):
+ * - if the `timestamp` of the latest `channel_update` in
+ *   either direction is older than two weeks (1209600 seconds):
  *     - MAY prune the channel.
  *     - MAY ignore the channel.
  */

gossipd/routing.c

@@ -1926,12 +1926,10 @@ void route_prune(struct routing_state *rstate)
 			continue;
 
 		/* BOLT #7:
-		 *   - if a channel's latest `channel_update`s `timestamp` is
-		 *     older than two weeks (1209600 seconds):
+		 * - if the `timestamp` of the latest `channel_update` in
+		 *   either direction is older than two weeks (1209600 seconds):
 		 *    - MAY prune the channel.
 		 */
-		/* FIXME: I disagree with the above quote: it used to say "oldest", which is what we
-		   use here: */
 		/* This is a fancy way of saying "both ends must refresh!" */
 		if (!is_halfchan_defined(&chan->half[0])
 		    || chan->half[0].bcast.timestamp < highwater