Add new features to the config command for control of the config file:

- manipulate the autoexec section
- display information on sections and values
- show the used config files and startup command line parameters 
- restart capability
- save config files either in the config or program directory

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3651

include/mapper.h

@@ -21,7 +21,7 @@
 
 enum MapKeys {
 	MK_f1,MK_f2,MK_f3,MK_f4,MK_f5,MK_f6,MK_f7,MK_f8,MK_f9,MK_f10,MK_f11,MK_f12,
-	MK_return,MK_kpminus,MK_scrolllock,MK_printscreen,MK_pause
+	MK_return,MK_kpminus,MK_scrolllock,MK_printscreen,MK_pause,MK_home
 
 };