htlcswitch+peer: allow the disabling of quiescence

Here we add a flag where we can disable quiescence. This will be used
in the case where the feature is not negotiated with our peer.

feature/default_sets.go

@@ -84,6 +84,10 @@ var defaultSetDesc = setDesc{
 		SetNodeAnn: {}, // N
 		SetInvoice: {}, // 9
 	},
+	lnwire.QuiescenceOptional: {
+		SetInit:    {}, // I
+		SetNodeAnn: {}, // N
+	},
 	lnwire.ShutdownAnySegwitOptional: {
 		SetInit:    {}, // I
 		SetNodeAnn: {}, // N

feature/manager.go

@@ -63,6 +63,9 @@ type Config struct {
 	// NoRouteBlinding unsets route blinding feature bits.
 	NoRouteBlinding bool
 
+	// NoQuiescence unsets quiescence feature bits.
+	NoQuiescence bool
+
 	// NoTaprootOverlay unsets the taproot overlay channel feature bits.
 	NoTaprootOverlay bool
 
@@ -199,6 +202,9 @@ func newManager(cfg Config, desc setDesc) (*Manager, error) {
 			raw.Unset(lnwire.Bolt11BlindedPathsOptional)
 			raw.Unset(lnwire.Bolt11BlindedPathsRequired)
 		}
+		if cfg.NoQuiescence {
+			raw.Unset(lnwire.QuiescenceOptional)
+		}
 		if cfg.NoTaprootOverlay {
 			raw.Unset(lnwire.SimpleTaprootOverlayChansOptional)
 			raw.Unset(lnwire.SimpleTaprootOverlayChansRequired)