Add support for Supr key

Del : Delete character under cursor.
    Shift + Del : Delete the line under cursor.
    Ctrl + Del: Delete the full screen.
---
 config.def.h |   16 ++++++++++++----
 st.info      |    2 ++
 2 files changed, 14 insertions(+), 4 deletions(-)

config.def.h

@@ -131,8 +131,12 @@ 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,     ShiftMask,      "\033[3;2~",     0,    0,    0},
-	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[3~",       0,    0,    0},
+	{ XK_KP_Delete,     ControlMask,    "\033[2J",      -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},
+	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[P",       -1,    0,    0},
+	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[3~",      +1,    0,    0},
 	{ XK_KP_Multiply,   XK_ANY_MOD,     "\033Oj",       +2,    0,    0},
 	{ XK_KP_Add,        XK_ANY_MOD,     "\033Ok",       +2,    0,    0},
 	{ XK_KP_Enter,      XK_ANY_MOD,     "\033OM",       +2,    0,    0},
@@ -183,8 +187,12 @@ 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,        ShiftMask,      "\033[3;2~",     0,    0,    0},
-	{ XK_Delete,        XK_ANY_MOD,     "\033[3~",       0,    0,    0},
+	{ XK_Delete,        ControlMask,    "\033[2J",      -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},
+	{ XK_Delete,        XK_ANY_MOD,     "\033[P",       -1,    0,    0},
+	{ XK_Delete,        XK_ANY_MOD,     "\033[3~",      +1,    0,    0},
 	{ XK_Home,          ShiftMask,      "\033[1;2H",     0,    0,    0},
 	{ XK_Home,          XK_ANY_MOD,     "\033[H",        0,   -1,    0},
 	{ XK_Home,          XK_ANY_MOD,     "\033[1~",       0,   +1,    0},

st.info

@@ -71,6 +71,8 @@ st| simpleterm,
 	kRIT=\E[1;2C,
 	kind=\E[1;2B,
 	kri=\E[1;2A,
+	kclr=\E[3;5~,
+	kdl1=\E[3;2~,
 	kdch1=\E[3~,
 	kich1=\E[2~,
 	kend=\E[4~,