omit unchanged default binds from saved.cfg

omitunchangeddefaultbinds n

  0 print
  1 print, but commented out
  2 omit

The new var _defaultbinds is used to mark default binds in resetbinds.cfg.

DOCREF omitunchangeddefaultbinds

config/resetbinds.cfg

@@ -31,6 +31,8 @@ alias key_commandline [ saycommand / ]
 alias key_prevweapon [ weapon (prevweapon) ]
 alias key_editmeta2 [ editmeta2down = 1 ; onrelease [ editmeta2down = 0 ] ]
 
+_defaultbinds 1 // do not save the following binds to saved.cfg
+
 bind MOUSE1 attack
 bind MOUSE2 altaction
 editbind MOUSE2 [ showmenu editing ]
@@ -226,6 +228,8 @@ bind SYSREQ []
 bind BREAK []
 bind MENU []
 
+_defaultbinds 0
+
 omitunchangeddefaults 1  // switch to a clean saved.cfg when keybinds are reset
 
 persistidents 1