Added 'tab' patch (forgot the config.h)

Author: pvpscript

config.h

@@ -43,6 +43,13 @@ static const Layout layouts[] = {
 	{ "[M]",      monocle },
 };
 
+/*   Display modes of the tab bar: never shown, always shown, shown only in  */
+/*   monocle mode in presence of several windows.                            */
+/*   A mode can be disabled by moving it after the showtab_nmodes end marker */
+enum showtab_modes { showtab_never, showtab_auto, showtab_nmodes, showtab_always};
+static const int showtab            = showtab_auto; /* Default tab bar show mode  */
+static const Bool toptab            = True;         /* False means bottom tab bar */
+
 /* key definitions */
 #define MODKEY Mod1Mask
 #define TAGKEYS(KEY,TAG) \