config+protocol: enable anchor commitments (zero-fee HTLC ) by default

lncfg/protocol.go

@@ -17,6 +17,10 @@ type ProtocolOptions struct {
 	// (channels larger than 0.16 BTC) channels, which is the opposite of
 	// mini.
 	WumboChans bool `long:"wumbo-channels" description:"if set, then lnd will create and accept requests for channels larger chan 0.16 BTC"`
+
+	// NoAnchors should be set if we don't want to support opening or accepting
+	// channels having the anchor commitment type.
+	NoAnchors bool `long:"no-anchors" description:"disable support for anchor commitments"`
 }
 
 // Wumbo returns true if lnd should permit the creation and acceptance of wumbo
@@ -24,3 +28,9 @@ type ProtocolOptions struct {
 func (l *ProtocolOptions) Wumbo() bool {
 	return l.WumboChans
 }
+
+// NoAnchorCommitments returns true if we have disabled support for the anchor
+// commitment type.
+func (l *ProtocolOptions) NoAnchorCommitments() bool {
+	return l.NoAnchors
+}