Move online-mode to main options

instance/server.properties

@@ -14,11 +14,12 @@ query.port=25565
 rcon.port=25575
 difficulty=hard
 hardcore=false
+online-mode=true
 enforce-whitelist=true
 white-list=true
 pvp=true
 
-# other options
+### other options
 # broadcast-rcon-to-ops=true
 # allow-nether=true
 # enable-command-block=true
@@ -45,6 +46,5 @@ pvp=true
 # use-native-transport=true
 # spawn-protection=0
 # resource-pack-sha1=
-# online-mode=true
 # allow-flight=true
 # max-world-size=29999984