Change the result that webfinger returns from the first alias

to the last because mastodon doesn't like

https://my.instance/@me but https://my.instance/users/me

webfinger.go

@@ -108,5 +108,5 @@ func RemoteLookup(handle string) string {
 
 	aliases := result["aliases"].([]interface{})
 
-	return aliases[0].(string)
+	return aliases[len(aliases)-1].(string)
 }