📊 Add option for starting ping requirement on login

[jonathan-robertson]

This could be an additional ping check on login attempt. This could allow players to have a higher initial requirement to get through the gate... but once in, latency will be allowed to fluctuate a bit more since we know the players started with better ping.

If a player has 150 ping while trying to log into the server, we might want to immediately bump... but for players already connected, we might want to limit to 200... assuming that player was able to log in below 150ms latency initially... suddenly seeing 200ms of latency from the same player likely suggests they're experiencing temporary network trouble that may automatically recover.

• add bool option to enable/disable this feature
• add int option for initial check limit (default to 150)