add option to deactivate swallowing (Meta,Ctrl,s)

CHANGES

@@ -9,6 +9,7 @@ This version of dwm differs from the original on suckless.org as follows:
 - applied modified zoomswap patch
   (added config option zoomswap = 1 for active, = 0 for old behaviour)
 - applied swallow patch
+- added option to dynamically deactivate swallowing
 - applied modified centered master patch
   (bound to Mod+c, no centered floating, changed stacking behaviour to always push onto left side)
 

config.def.h

@@ -94,6 +94,7 @@ static Key keys[] = {
 	{ MODKEY,                       XK_c,      setlayout,      {.v = &layouts[3]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ControlMask,           XK_space,  togglefloating, {0} },
+	{ MODKEY|ControlMask,           XK_s,      toggleswallowing, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
 	{ MODKEY|ControlMask,           XK_0,      tag,            {.ui = ~0 } },
 	{ MODKEY,                       XK_comma,  focusmon,       {.i = -1 } },

dwm.c

@@ -255,6 +255,7 @@ static void tagmon(const Arg *arg);
 static void tile(Monitor *);
 static void togglebar(const Arg *arg);
 static void togglefloating(const Arg *arg);
+static void toggleswallowing(const Arg *arg);
 static void toggletag(const Arg *arg);
 static void toggleview(const Arg *arg);
 static void unfocus(Client *c, int setfocus);
@@ -289,6 +290,7 @@ static Client *termforwin(const Client *c);
 static pid_t winpid(Window w);
 
 /* variables */
+static int swallowing = 1;
 static Systray *systray =  NULL;
 static Client *prevzoom = NULL;
 static const char broken[] = "broken";
@@ -477,7 +479,8 @@ attachstack(Client *c)
 void
 swallow(Client *p, Client *c)
 {
-
+	if (!swallowing)
+		return;
 	if (c->noswallow || c->isterminal)
 		return;
 	if (c->noswallow && !swallowfloating && c->isfloating)
@@ -2076,6 +2079,12 @@ togglefloating(const Arg *arg)
 	arrange(selmon);
 }
 
+void
+toggleswallowing(const Arg *arg)
+{
+	swallowing = !swallowing;
+}
+
 void
 toggletag(const Arg *arg)
 {