Makefile: update bolt version to include option_anchors_zero_fee_htlc_tx.

This touches a lot of text, mainly to change "if `option_anchor_outputs`"
to "if `option_anchors`"

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

lightningd/closing_control.c

@@ -231,7 +231,8 @@ void peer_start_closingd(struct channel *channel,
 		return;
 	}
 
-	/* BOLT #2:
+	/* FIXME: This is the old BOLT 2 text, which restricted the closing
+	 * fee to cap at the final commitment fee.  We still do this for now.
 	 *
 	 * The sending node:
 	 *  - MUST set `fee_satoshis` less than or equal to the base

lightningd/opening_control.c

@@ -147,12 +147,14 @@ wallet_commit_channel(struct lightningd *ld,
 	 * #### Requirements
 	 *
 	 * Both peers:
-	 *   - if `option_static_remotekey` or `option_anchor_outputs` was negotiated:
-	 *     - `option_static_remotekey` or `option_anchor_outputs` applies to all commitment
-	 *       transactions
+	 *  - if `option_static_remotekey`, `option_anchor_outputs` or
+	 *    `option_anchors_zero_fee_htlc_tx` was negotiated:
+	 *    - `option_static_remotekey`, `option_anchor_outputs` or
+	 *      `option_anchors_zero_fee_htlc_tx` applies to all commitment transactions
 	 *   - otherwise:
-	 *     - `option_static_remotekey` or `option_anchor_outputs` does not apply to any commitment
-	 *        transactions
+	 *       - `option_static_remotekey`, `option_anchor_outputs` or
+	 *      `option_anchors_zero_fee_htlc_tx` does not apply to any commitment
+	 *      transactions
 	 */
 	/* i.e. We set it now for the channel permanently. */
 	if (feature_negotiated(ld->our_features,

lightningd/peer_control.c

@@ -612,7 +612,7 @@ static struct amount_sat commit_txfee(const struct channel *channel,
 
 	if (channel->option_anchor_outputs) {
 		/* BOLT #3:
-		 * If `option_anchor_outputs` applies to the commitment
+		 * If `option_anchors` applies to the commitment
 		 * transaction, also subtract two times the fixed anchor size
 		 * of 330 sats from the funder (either `to_local` or
 		 * `to_remote`).