zfs list output RELENG_13 vs RELENG_14

From: mike tancsa <mike_at_sentex.net>
Date: Fri, 20 Oct 2023 14:08:32 UTC
Hi all,

     Just wondering if this change in output was on purpose or 
accidental. It breaks telegraf parsing for one thing, perhaps other 
scripts as well. In RELENG_13 we have

zfs list -Hp -o name,avail,used,usedsnap,usedds

  zfs list -Hp -o name,avail,used,usedsnap,usedds
cageroot        723864289280    216733548544    0       98304
cageroot/ROOT   723864289280    17766383616     0       98304
cageroot/ROOT/default   723864289280    17766285312     0 17766285312
cageroot/tmp    723864289280    21332996096     0 21332996096
cageroot/usr    723864289280    124012130304    0       98304

...

vs

releng_14

# zfs list -Hp -o name,avail,used,usedsnap,usedds
zroot   10016657408     15467933696     -       -
zroot/ROOT      10016657408     4927225856      -       -
zroot/ROOT/default      10016657408     4926791680      -       -
zroot/home      10016657408     778240  -       -
zroot/tmp       10016657408     589824  -       -
zroot/usr       10016657408     10526662656     -       -
zroot/usr/obj   10016657408     430080  -       -
zroot/usr/ports 10016657408     10525368320     -       -

with the dashes for zero values.

     ---Mike