fs: remove mandatory locking and flock() LOCK_MAND support

Jeffrey Laytonrequested to merge
jtlayton/centos-stream-9:bz2017438 into main

Bugzilla: http://bugzilla.redhat.com/2017438

A pile of patches to finish the removal of mandatory locking and flock LOCK_MAND support, and to update comments and documentation accordingly. This also contains a couple of patches to fix potential deadlocks in the fowner and fasync infrastructure.

Signed-off-by: Jeffrey Layton jlayton@redhat.com

Edited by Jeffrey Layton

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