s/AI/LLM (be consistent with terms)

Put the examples under the Discretionary and Limited Use section

Incorporate acceptable use examples from Warner.

Tweak the sentence motivating the policy.

Be consistent and use * instead of - for lists

Fix grep pattern to match RFC 5424 syslog timestamps in 800.loginfail

@rosenfeld_grumpf.hope-2000.org, we need to update the commit message to align with https://docs.freebsd.org/en/articles/committers-guide/#commit-log-message. How about this?

Address comments from @michaelo

Thanks. At your convenience.

@michaelo, I believe I've addressed all your concerns, and I've performed some light testing with manually created logs. Are you able and willing to do any testing with your real logs for the three scripts?

• Add a space after %e
• Ensure we match what we really want by putting the .* in the grep command and putting the patterns for the alternatives timestamps inside parentheses.
• We now neeed egrep in 900.tcpwrap.

Remove some unused variables.

Michael, take a look at https://reviews.freebsd.org/D54606, which might be a cleaner approach.

Michael, I took another look at your review, and it dawned on me that we don't need to know which timestamp format is in use. We only need patterns that match either format. Rather than trying to explain things in the other review or take it over, I thought I would first create a separate review for you to consider.
I haven't thoroughly tested this version because I don't have adequate logs.