changed plus key to MODKEY-Shift-plus (US-layout restrictions ;)

config.arg.h

@@ -36,7 +36,7 @@ static Key key[] = { \
 	{ MODKEY,			XK_Return,	zoom,		{ 0 } }, \
 	{ MODKEY,			XK_g,		resizemaster,	{ .i = 15 } }, \
 	{ MODKEY,			XK_s,		resizemaster,	{ .i = -15 } }, \
-	{ MODKEY,			XK_plus,	incnmaster,	{ .i = 1 } }, \
+	{ MODKEY|ShiftMask,		XK_plus,	incnmaster,	{ .i = 1 } }, \
 	{ MODKEY,			XK_minus,	incnmaster,	{ .i = -1 } }, \
 	{ MODKEY|ShiftMask,		XK_0,		tag,		{ .i = -1 } }, \
 	{ MODKEY|ShiftMask,		XK_1,		tag,		{ .i = 0 } }, \

config.default.h

@@ -31,7 +31,7 @@ static Key key[] = { \
 	{ MODKEY,			XK_Return,	zoom,		{ 0 } }, \
 	{ MODKEY,			XK_g,		resizemaster,	{ .i = 15 } }, \
 	{ MODKEY,			XK_s,		resizemaster,	{ .i = -15 } }, \
-	{ MODKEY,			XK_plus,	incnmaster,	{ .i = 1 } }, \
+	{ MODKEY|ShiftMask,		XK_plus,	incnmaster,	{ .i = 1 } }, \
 	{ MODKEY,			XK_minus,	incnmaster,	{ .i = -1 } }, \
 	{ MODKEY|ShiftMask,		XK_0,		tag,		{ .i = -1 } }, \
 	{ MODKEY|ShiftMask,		XK_1,		tag,		{ .i = 0 } }, \

dwm.1

@@ -70,7 +70,7 @@ Grow master area (tiling mode only).
 .B Mod1-s
 Shrink master area (tiling mode only).
 .TP
-.B Mod1-plus
+.B Mod1-Shift-plus
 Increase clients of master area (tiling mode only).
 .TP
 .B Mod1-minus