Add sequence for printing the current selection

This is very usefull in order to can select what is sent
to the plumber.

config.def.h

@@ -109,6 +109,7 @@ static Shortcut shortcuts[] = {
 	/* mask                 keysym          function        argument */
 	{ ControlMask,          XK_Print,       toggleprinter,  {.i =  0} },
 	{ ShiftMask,            XK_Print,       printscreen,    {.i =  0} },
+	{ XK_ANY_MOD,           XK_Print,       printsel,       {.i =  0} },
 	{ MODKEY|ShiftMask,     XK_Prior,       xzoom,          {.i = +1} },
 	{ MODKEY|ShiftMask,     XK_Next,        xzoom,          {.i = -1} },
 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },