x11: do not set _NET_WM_BYPASS_COMPOSITOR by default

It's pretty "unfriendly" and causes too many issues. (Probably. At least
they're more obvious to a user than e.g. broken frame timing.)

Potentially we could apply heuristics like applying this only on
fullscreen, but let's not. It's up to the user to configure this to
get best results.

Fixes #2997.

DOCS/man/options.rst

@@ -2072,8 +2072,8 @@ Window
     This option might be removed in the future.
 
 ``--x11-bypass-compositor=<yes|no>``
-    If set to ``yes`` (default), then ask the compositor to unredirect the
-    mpv window. This uses the ``_NET_WM_BYPASS_COMPOSITOR`` hint.
+    If set to ``yes``, then ask the compositor to unredirect the mpv window
+    (default: no). This uses the ``_NET_WM_BYPASS_COMPOSITOR`` hint.
 
 
 Disc Devices

options/options.c

@@ -709,7 +709,7 @@ const struct MPOpts mp_default_opts = {
         .border = 1,
         .WinID = -1,
         .window_scale = 1.0,
-        .x11_bypass_compositor = 1,
+        .x11_bypass_compositor = 0,
         .mmcss_profile = "Playback",
     },
     .allow_win_drag = 1,