discovery/gossiper: persist remote channel policy updates' max htlc

discovery/gossiper.go

@@ -2014,6 +2014,7 @@ func (d *AuthenticatedGossiper) processNetworkAnnouncement(
 			ChannelFlags:              msg.ChannelFlags,
 			TimeLockDelta:             msg.TimeLockDelta,
 			MinHTLC:                   msg.HtlcMinimumMsat,
+			MaxHTLC:                   msg.HtlcMaximumMsat,
 			FeeBaseMSat:               lnwire.MilliSatoshi(msg.BaseFee),
 			FeeProportionalMillionths: lnwire.MilliSatoshi(msg.FeeRate),
 			ExtraOpaqueData:           msg.ExtraOpaqueData,