Adds config inclusion system

config/config.txt

@@ -1,3 +1,9 @@
+# You can use the "$include" directive to split your configs however you want
+
+$include game_options.txt
+$include dbconfig.txt
+$include comms.txt
+
 # You can use the @ character at the beginning of a config option to lock it from being edited in-game
 # Example usage:
 # @SERVERNAME tgstation