Allow local_editor in cmd_edit to take arguments

Such as vim -i NONE. This may allow command injection via arguments.
However, you can already start an arbitrary program by setting
LocalEditor or escaping the editor.

msf > setg LocalEditor /bin/sh
LocalEditor => /bin/sh
msf > edit -i
[*] Launching /bin/sh -i
$

lib/msf/ui/console/command_dispatcher/modules.rb

@@ -92,7 +92,7 @@ module Msf
               end
 
               print_status("Launching #{editor} #{path}")
-              system(editor, path)
+              system(*editor.split, path)
 
               # XXX: This will try to reload *any* .rb and break on modules
               if args.length > 0 && path.end_with?('.rb')