arc_summary, arcstat, and dbufstat are missing manpages

[strugee]

System information

Type	Version/Name
Distribution Name	Debian
Distribution Version	buster (10)
Linux Kernel	4.19+105+deb10u3
Architecture	amd64
ZFS Version	0.8.3-1~bpo10+1
SPL Version	0.8.3-1~bpo10+1

Describe the problem you're observing

The arc_summary, arcstat, and dbufstat utilities are missing manual pages.

Describe how to reproduce the problem

% man arc_summary
No manual entry for arc_summary
See 'man 7 undocumented' for help when manual pages are not available.

etc.

Include any warning/errors/backtraces from the system logs

N/A

[stale[bot]]

This issue has been automatically marked as "stale" because it has not had any activity for a while. It will be closed in 90 days if no further activity occurs. Thank you for your contributions.

[devZer0]

on promox 6.4 system (debian buster) with zfs 2.0.4 , arcstat and dbufstat now has a manpage, but for my curiosity, manpage for arc_summary is missing

[stale[bot]]

This issue has been automatically marked as "stale" because it has not had any activity for a while. It will be closed in 90 days if no further activity occurs. Thank you for your contributions.

[strugee]

I imported arcstat(1) from illumos in #10288, but looks like dbufstat(1) is a downstream Debian addition. Any interest in importing it @devZer0?

[ag3601]

arc_summary on RHEL 9 is still missing

[stale[bot]]

This issue has been automatically marked as "stale" because it has not had any activity for a while. It will be closed in 90 days if no further activity occurs. Thank you for your contributions.

[devZer0]

not stale