Ping equalization

[Irbyz]

An option to artificially increase latency of players to match highest ping a player has on the server.
There could be several ways of enabling it:

• server variable that would enable it permanently,
• admin and/or referee command (e.g. !equalping, ref equalping),
• a vote (e.g. callvote equalping).

Probably the latter two could be temporary, equalizing pings just for the duration of a map. Maybe a server variable could control whether ping equalization is going to be changed temporarily or permanently.

Also there could be an option to cap it, for example not go above 100 ms.