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DuckMut

It does two completely unrelated things (that's why I gave it a neutral name).

• It resets the server to the first map in the active map-cycle list in case the server is idle (without any players and/or spectators) for more than X minutes (configurable).
  
  
• It prevents that players can join in the last X waves (configurable) of the current map by activating a server password for those last waves.

At first run it will create a KFBuckMut.ini file in your servers config folder. Use that file to configure the mutator. The mutator contains the following settings:

• MapCycleResetTimeout
  This is the timeout value for the map-cycle to reset (revert to the first map on the active map-cycle list). The setting is in seconds with a minimum value of 600 seconds (10 minutes).
  
  
• ServerLockWavePercentage
  The number of last waves that need to be locked (preventing others to join) in percentage. Percentage is used to allow the same ratio when the server is switched between normal or long matches.
  
  
• ServerLockPassword
  The password used to lock the server. It's up to the server admin to share this password within his clan. If he does, then clan members will still be able to join the server while it is locked.

The changed settings will take effect on the next map change.

• Stop your server
  
  
• Add the mutator to your server by adding ServerSubscribedWorkshopItems=736579823 to the OnlineSubsystemSteamworks.KFWorkshopSteamworks section of your servers PCServer-KFEngine.ini file. More about Steam Workshop for servers can be found here[wiki.tripwireinteractive.com].
  
  
• Start your server. After some time the server should start downloading the mutator.
  
  
• After the download completed, then go to your servers web-admin Change map page and add ?Mutator=DuckMut.DuckMut to the ADDITIONAL URL VARIABLES field. Next click on CHANGE GAME.

After this the mutator will start running, though you will still need to configure it (see above section).

Currently the mutator will unrank your server (waiting for white-listing).