lncfg: makr tor.v2 as deprecated

lncfg/tor.go

@@ -12,7 +12,7 @@ type Tor struct {
 	Control                     string `long:"control" description:"The host:port that Tor is listening on for Tor control connections"`
 	TargetIPAddress             string `long:"targetipaddress" description:"IP address that Tor should use as the target of the hidden service"`
 	Password                    string `long:"password" description:"The password used to arrive at the HashedControlPassword for the control port. If provided, the HASHEDPASSWORD authentication method will be used instead of the SAFECOOKIE one."`
-	V2                          bool   `long:"v2" description:"Automatically set up a v2 onion service to listen for inbound connections"`
+	V2                          bool   `long:"v2" description:"DEPRECATED: Tor v2 onion services are obsolete and support will be removed in v0.21.0. Use v3 instead." hidden:"true"`
 	V3                          bool   `long:"v3" description:"Automatically set up a v3 onion service to listen for inbound connections"`
 	PrivateKeyPath              string `long:"privatekeypath" description:"The path to the private key of the onion service being created"`
 	EncryptKey                  bool   `long:"encryptkey" description:"Encrypts the Tor private key file on disk"`