~/.config/st: Use "standard" terminal zoom bindings

Ctrl+Shift+"Plus"  => zoom in
Ctrl+Shift+"Minus" => zoom out
Ctrl+Shift+0       => reset zoom

.config/st/config.h

@@ -166,15 +166,16 @@ static MouseShortcut mshortcuts[] = {
#define MODKEY Mod1Mask
#define TERMMOD (ControlMask|ShiftMask)
static Shortcut shortcuts[] = {
	/* mask                 keysym          function        argument */
	{ XK_ANY_MOD,           XK_Break,       sendbreak,      {.i =  0} },
	{ ControlMask,          XK_Print,       toggleprinter,  {.i =  0} },
	{ ShiftMask,            XK_Print,       printscreen,    {.i =  0} },
	{ XK_ANY_MOD,           XK_Print,       printsel,       {.i =  0} },
	{ TERMMOD,              XK_Prior,       zoom,           {.f = +1} },
	{ TERMMOD,              XK_Next,        zoom,           {.f = -1} },
	{ TERMMOD,              XK_Home,        zoomreset,      {.f =  0} },
	{ TERMMOD,              XK_plus,        zoom,           {.f = +1} },
	{ ControlMask,          XK_minus,       zoom,           {.f = -1} },
	{ TERMMOD,              XK_parenright,  zoomreset,      {.f =  0} },
	{ TERMMOD,              XK_C,           clipcopy,       {.i =  0} },
	{ TERMMOD,              XK_V,           clippaste,      {.i =  0} },
	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },