OpenZFS 10473 - zfs(1M) missing cross-reference to zfs-program(1M)

[rlaager]

Motivation and Context

This ports an OpenZFS commit:
OpenZFS-issue: https://www.illumos.org/issues/10473
OpenZFS-commit: illumos/illumos-gate@736e67003

Description

One part of this commit was already applied. The only remaining substance is to add a cross-reference to zfs-program.8 at the end of zfs.8.

The date change will ultimately conflict with #8710 since there were later changes. If this is accepted first, the porting will be closer to 1:1, but it really doesn't matter, as long as the latter date is kept in the end.

How Has This Been Tested?

I viewed the man page with man.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (a change to man pages or other documentation)

Checklist:

• My code follows the ZFS on Linux code style requirements.
• I have updated the documentation accordingly.
• I have read the contributing document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• All commit messages are properly formatted and contain Signed-off-by.

Note that this does NOT have a Signed-off-by, as the convention seems to be to omit that when porting OpenZFS commits, in favor of Ported-by:.

[codecov]

Codecov Report

Merging #8711 into master will increase coverage by 0.18%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8711      +/-   ##
==========================================
+ Coverage   78.64%   78.82%   +0.18%     
==========================================
  Files         381      381              
  Lines      117615   117615              
==========================================
+ Hits        92496    92712     +216     
+ Misses      25119    24903     -216

Flag	Coverage Δ
#kernel	79.32% <ø> (+0.06%)	⬆️
#user	67.76% <ø> (+0.54%)	⬆️

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