feature+lncfg: add config option to turn of anysegwit

sample-lnd.conf

@@ -1191,6 +1191,10 @@ litecoin.node=ltcd
 ; option-scid-alias flag to also be set.
 ; protocol.zero-conf=true
 
+; Set to disable support for using P2TR addresses (and beyond) for co-op
+; closing.
+; protocol.no-any-segwit
+
 [db]
 
 ; The selected database backend. The current default backend is "bolt". lnd