Recognize Ctrl-[ as Escape.

Patch by OKUMURA N. Shin-ya.

http://bugs.gentoo.org/71870

--- data/keymaps/i386/qwerty/jp106.map
+++ data/keymaps/i386/qwerty/jp106.map
@@ -35,6 +35,7 @@
 keycode  26 = at               grave
 	control	keycode  26 = nul
 keycode  27 = bracketleft      braceleft
+	control	keycode  27 = Escape
 keycode  28 = Return
 	alt	keycode  28 = Meta_Control_m
 keycode  29 = Control