Add comment about the reaper thread dealing with config file changes

example/gamemode.ini

@@ -1,5 +1,5 @@
 [general]
-; The reaper thread will check every 5 seconds for exited clients
+; The reaper thread will check every 5 seconds for exited clients and for config file changes
 reaper_freq=5
 
 ; The desired governor is used when entering GameMode instead of "performance"