* 'PR/losetup-remove' of https://github.com/karelzak/util-linux-work:
losetup: improve command line option processing
lostup: report EACCES on loop-control
losetup: improve --remove documentation
losetup: make --remove a long-only option with mutual exclusivity
lib/loopdev: introduce loopcxt_get_device_nr() helper
losetup: add error feedback for --remove command