cr_canseeotheruids(9): Revamp, mark as internal

[olce]

Summary

Significantly clarify. Replace references to cr_canseeothergids(9) by ones to
cr_bsd_visible(9).

[emaste]

For commit I think these manpage updates could be grouped into one

[bcr]

Thanks for these man page updates.
Have you checked them with "mandoc -Tlint" and textproc/igor for any extra warnings these tools might emit?

share/man/man9/cr_seeotheruids.9

42

You need a line break here after the sentence stop.

[olce]

Change one-line description.

[olce]

In D40635#928633, @bcr wrote:

Thanks for these man page updates.
Have you checked them with "mandoc -Tlint" and textproc/igor for any extra warnings these tools might emit?

Yes, I have now.

The only warnings I've not fixed yet is for the order of references in SEE ALSO (not in this specific revision, but in some others), please see https://reviews.freebsd.org/D40632 for the rationale.

[olce]

Rename cr_bsd_visibility() to cr_bsd_visible().

[olce]

And also addressed similar issues as reported in https://reviews.freebsd.org/D40639.

[olce]

'cr_see*' => 'cr_cansee*' (suppressed a rename in the stack).

[olce]

Fix inverted description of when the policy is enabled.

[mhorne]

My comments from D40633 apply here too.

[olce]

Address @mhorne's comments.