From the 1.46 Dedicated Server guide:
#login <password> - Login as server administrator
#logout - Logout, but stay connected as a normal user
#init - Reload server config file loaded by -config option.
#kick <player_name> - Kick given player
#kick <player_number> - Kick player with given number
#restart - Restart mission
#reassign - Go back to side selection screen
#mission <mission_name> - Select mission with known name
#missions - Select mission
#shutdown - Shutdown server
#userlist - Display list of all users
#monitor <interval_in_sec> - Start server monitoring. Server CPU load and bandwidth usage is displayed in the global chat channel. The default interval is 10 seconds. To stop monitoring type monitor 0.