Slock Changes

- Replace light-locker with slock in config.def.h
- Add keypress mask for slock mediakeys patch in dwm.c

dwm.c

@@ -2060,7 +2060,7 @@ setup(void)
 	wa.cursor = cursor[CurNormal]->cursor;
 	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
 		|ButtonPressMask|PointerMotionMask|EnterWindowMask
-		|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask;
+		|LeaveWindowMask|StructureNotifyMask|PropertyChangeMask|KeyPressMask;
 	XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
 	XSelectInput(dpy, root, wa.event_mask);
 	grabkeys();