Make CONTROL + DELETE delete a line

If CONTROL + INSERT inserts a line then it seems natural CONTROL + DELETE
removes a line.

config.def.h

@@ -184,7 +184,7 @@ static Key key[] = {
 	{ XK_KP_Insert,     ControlMask,    "\033[2;5~",    +1,    0,    0},
 	{ XK_KP_Insert,     XK_ANY_MOD,     "\033[4h",      -1,    0,    0},
 	{ XK_KP_Insert,     XK_ANY_MOD,     "\033[2~",      +1,    0,    0},
-	{ XK_KP_Delete,     ControlMask,    "\033[2J",      -1,    0,    0},
+	{ XK_KP_Delete,     ControlMask,    "\033[M",       -1,    0,    0},
 	{ XK_KP_Delete,     ControlMask,    "\033[3;5~",    +1,    0,    0},
 	{ XK_KP_Delete,     ShiftMask,      "\033[2K",      -1,    0,    0},
 	{ XK_KP_Delete,     ShiftMask,      "\033[3;2~",    +1,    0,    0},
@@ -240,7 +240,7 @@ static Key key[] = {
 	{ XK_Insert,        ControlMask,    "\033[2;5~",    +1,    0,    0},
 	{ XK_Insert,        XK_ANY_MOD,     "\033[4h",      -1,    0,    0},
 	{ XK_Insert,        XK_ANY_MOD,     "\033[2~",      +1,    0,    0},
-	{ XK_Delete,        ControlMask,    "\033[2J",      -1,    0,    0},
+	{ XK_Delete,        ControlMask,    "\033[M",       -1,    0,    0},
 	{ XK_Delete,        ControlMask,    "\033[3;5~",    +1,    0,    0},
 	{ XK_Delete,        ShiftMask,      "\033[2K",      -1,    0,    0},
 	{ XK_Delete,        ShiftMask,      "\033[3;2~",    +1,    0,    0},