sample-lnd: showing how to enable scid-alias, zero-conf feature bits

sample-lnd.conf

@@ -1182,6 +1182,14 @@ litecoin.node=ltcd
 ; channel type if it is enabled.
 ; protocol.no-script-enforced-lease=true
 
+; Set to enable support for option_scid_alias channels, which can be referred
+; to by an alias instead of the confirmed ShortChannelID. Additionally, is
+; needed to open zero-conf channels.
+; protocol.option-scid-alias=true
+
+; Set to enable support for zero-conf channels. This requires the
+; option-scid-alias flag to also be set.
+; protocol.zero-conf=true
 
 [db]