lncfg: make anchor commitments opt-in

This commit reverts the anchors-by-default change, and instead make
anchor commitments and opt-in option. The plan is to enable anchors by
default further down the line.

lncfg/protocol.go

@@ -1,5 +1,3 @@
-// +build !rpctest
-
 package lncfg
 
 // ProtocolOptions is a struct that we use to be able to test backwards
@@ -20,9 +18,8 @@ type ProtocolOptions struct {
 	// 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"`
+	// Anchors enables anchor commitments.
+	Anchors bool `long:"anchors" description:"enable support for anchor commitments"`
 }
 
 // Wumbo returns true if lnd should permit the creation and acceptance of wumbo
@@ -34,5 +31,5 @@ func (l *ProtocolOptions) Wumbo() bool {
 // NoAnchorCommitments returns true if we have disabled support for the anchor
 // commitment type.
 func (l *ProtocolOptions) NoAnchorCommitments() bool {
-	return l.NoAnchors
+	return !l.Anchors
 }