Starting the deprecation process for --sw-opti

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

src/compton.c

@@ -1856,6 +1856,8 @@ update_refresh_rate(session_t *ps) {
  */
 static bool
 swopti_init(session_t *ps) {
+  log_warn("--sw-opti is going to be deprecated. If you get real benefits from using "
+           "this option, please open an issue to let us know.");
   // Prepare refresh rate
   // Check if user provides one
   ps->refresh_rate = ps->o.refresh_rate;

src/win.c

@@ -874,7 +874,7 @@ void add_win(session_t *ps, xcb_window_t id, xcb_window_t prev) {
 
   auto duplicated_win = find_win(ps, id);
   if (duplicated_win) {
-    log_warn("Window %#010x (recorded name: %s) added multiple times", id,
+    log_debug("Window %#010x (recorded name: %s) added multiple times", id,
              duplicated_win->name);
     return;
   }