apply patch dwm-exitmenu-6.3.diff

config.def.h

@@ -61,6 +61,7 @@ static char dmenumon[8]; /* component of dmenucmd, manipulated in spawn() */
 static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
 static const char *termcmd[]  = { "st", NULL };
 
+#include "exitdwm.c"
 static const Key keys[] = {
 	/* modifier                     key        function        argument */
 	{ MODKEY,                       XK_p,      spawn,          {.v = dmenucmd } },
@@ -97,6 +98,7 @@ static const Key keys[] = {
 	TAGKEYS(                        XK_9,                      8)
 	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
 	{ MODKEY|ControlMask|ShiftMask, XK_q,      quit,           {1} }, 
+	{ MODKEY|ShiftMask,             XK_e,      exitdwm,       {0} },
 };
 
 /* button definitions */