MOD RENAMED TO: MULTIPLAYER PERSISTENT AUTO SAVE.

Set up period and prefix of persistent autosaves.
-period in minutes
-game are saved with name "<prefix><autosaveId>", where <autosaveId> = floor(gameTime / period)

Works only on multiplayer servers. Only first player can set up period and prefix (so admin?).
In singleplayer only message is shown. So at least you are made aware you should autosave by hand.

Changelog
1.1.0
-Fixed colliding with native game autosave
1.0.0
-Mod Created