Call-for-testing: Asynchronous audio device detach

Hello,

Yesterday I committed a patch [1] which adds support for asynchronous
device detach for audio devices, something that many people with
detachable audio devices (e.g USB) have been asking for for years
[2][3][4][5][6][many more...]. I would like to ask you to give it a try
and let me know if everything works properly. Note that this patch
depends on dc831e93bad6 [7], so make sure to apply this one as well.

Christos

[1] https://cgit.freebsd.org/src/commit/?id=44e128fe9d92c1a544b801cb56e907a66ef34691
[2] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194727
[3] https://forums.freebsd.org/threads/not-entering-sleep-state-due-to-audio.82597/
[4] https://forums.freebsd.org/threads/forcing-off-the-computer-endlessly-waiting-for-sound-application-to-exit-at-sleep-suspend-time.80412/
[5] https://www.davidschlachter.com/misc/freebsd-usb-audio
[6] https://randomnixfix.wordpress.com/2021/10/23/why-the-freebsd-desktop-and-my-linux-rant/
[7] https://cgit.freebsd.org/src/commit/?id=e8c0d15a64fadb4a330f2da7244becaac161bb70