In the options menu, the player can select something which forces a reload of all non-birth options from the config file, in order to refresh annoying options which are saved with the game and do not pick up on when someone fixes them in their config file.

Add a config file parse error that appears when your nethackrc does not contain a newline at the end.

Command that saves your non-default, non-duplicated options to an autogenerated config file, or appends them to your existing config file, or writes out a config file with the wrong name and location (so you can copy and edit it).

Allow the game administrator to put a random value that will be mixed into the game’s seed into the sysconf file, so that RNG-predicting manipulation can’t be used.

You can set some fixed inventory letters in the config file, so you don’t have to adjust them manually. In its simplest form, this would apply only to starting inventory, and would allow things like a Tourist’s credit card to be guaranteed to be placed on a familiar letter.

MSGTYPE:replace to replace a specified message with another one.