manpage: lua: mention recent deprecations

These are listed in interface-changes.rst, but the documentation in the
manpage wasn't updated.

DOCS/man/lua.rst

@@ -412,6 +412,8 @@ These also live in the ``mp`` module, but are documented separately as they
 are useful only in special situations.
 
 ``mp.suspend()``
+    This function has been deprecated in mpv 0.21.0 (no replacement).
+
     Suspend the mpv main loop. There is a long-winded explanation of this in
     the C API function ``mpv_suspend()``. In short, this prevents the player
     from displaying the next video frame, so that you don't get blocked when
@@ -420,11 +422,15 @@ are useful only in special situations.
     Before mpv 0.17.0, this was automatically called by the event handler.
 
 ``mp.resume()``
+    This function has been deprecated in mpv 0.21.0 (no replacement).
+
     Undo one ``mp.suspend()`` call. ``mp.suspend()`` increments an internal
     counter, and ``mp.resume()`` decrements it. When 0 is reached, the player
     is actually resumed.
 
 ``mp.resume_all()``
+    This function has been deprecated in mpv 0.21.0 (no replacement).
+
     This resets the internal suspend counter and resumes the player. (It's
     like calling ``mp.resume()`` until the player is actually resumed.)
 
@@ -633,8 +639,6 @@ strictly part of the guaranteed API.
             Set to ``true`` if the process has been killed by mpv as a result
             of ``cancellable`` being set to ``true``.
 
-    In all cases, ``mp.resume_all()`` is implicitly called.
-
 ``utils.subprocess_detached(t)``
     Runs an external process and detaches it from mpv's control.
 
@@ -646,8 +650,6 @@ strictly part of the guaranteed API.
 
     The function returns ``nil``.
 
-    In all cases, ``mp.resume_all()`` is implicitly called.
-
 ``utils.parse_json(str [, trail])``
     Parses the given string argument as JSON, and returns it as a Lua table. On
     error, returns ``nil, error``. (Currently, ``error`` is just a string