Adding combo patch

patch/combo.c

@@ -0,0 +1,35 @@
+static int combo = 0;
+
+void
+keyrelease(XEvent *e) {
+	combo = 0;
+}
+
+void
+combotag(const Arg *arg) {
+	if(selmon->sel && arg->ui & TAGMASK) {
+		if (combo) {
+			selmon->sel->tags |= arg->ui & TAGMASK;
+		} else {
+			combo = 1;
+			selmon->sel->tags = arg->ui & TAGMASK;
+		}
+		focus(NULL);
+		arrange(selmon);
+	}
+}
+
+void
+comboview(const Arg *arg) {
+	unsigned newtags = arg->ui & TAGMASK;
+	if (combo) {
+		selmon->tagset[selmon->seltags] |= newtags;
+	} else {
+		selmon->seltags ^= 1;	/*toggle tagset*/
+		combo = 1;
+		if (newtags)
+			selmon->tagset[selmon->seltags] = newtags;
+	}
+	focus(NULL);
+	arrange(selmon);
+}

patch/combo.h

@@ -0,0 +1,3 @@
+static void keyrelease(XEvent *e);
+static void combotag(const Arg *arg);
+static void comboview(const Arg *arg);

patch/include.c

@@ -24,6 +24,10 @@
 #include "cfacts.c"
 #endif
 
+#if COMBO_PATCH
+#include "combo.c"
+#endif
+
 #if CYCLELAYOUTS_PATCH
 #include "cyclelayouts.c"
 #endif

patch/include.h

@@ -24,6 +24,10 @@
 #include "cfacts.h"
 #endif
 
+#if COMBO_PATCH
+#include "combo.h"
+#endif
+
 #if CYCLELAYOUTS_PATCH
 #include "cyclelayouts.h"
 #endif