HOWTO/man: improve descriptions of max open zones options
The options max_open_zones and job_max_open_zones control the number of
open zones for zonemode=zbd. However, descriptions in HOWTO and man
about these options are not clear enough since it is not well described
what an open zone is. Improve the description by adding explanation of
the open zone state. Also explain the default values for these options.
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://lore.kernel.org/r/20221215015606.2767187-3-shinichiro.kawasaki@wdc.com
[axboe: apply wording suggestion from Damien]
Signed-off-by: Jens Axboe <axboe@kernel.dk>