[autobackport: sssd-2-9-4] man: add details about 'an2ln'

[sssd-bot]

This is an automatic backport of PR#8396 man: add details about 'an2ln' to branch sssd-2-9-4, created by @sumit-bose.

Please make sure this backport is correct.

Note

The commits were cherry-picked without conflicts.

You can push changes to this pull request

git remote add sssd-bot git@github.com:sssd-bot/sssd.git
git fetch sssd-bot refs/heads/SSSD-sssd-backport-pr8396-to-sssd-2-9-4
git checkout SSSD-sssd-backport-pr8396-to-sssd-2-9-4
git push sssd-bot SSSD-sssd-backport-pr8396-to-sssd-2-9-4 --force

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Original commits
bcd9998 - man: add details about 'an2ln'

Backported commits

• 1e8e1c1 - man: add details about 'an2ln'

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Original Pull Request Body

With a recent security fix the 'an2ln' module was disabled in SSSD's configuration snippet for the localauth configuration of libkrb5. With this patch the related man page is update accordingly.

[gemini-code-assist]

Code Review

This pull request updates the sssd_krb5_localauth_plugin man page to document the disabling of the an2ln module for AD and IPA providers, which is a recent security enhancement. The changes are good, but I've suggested a small wording improvement to a note to make it less ambiguous, which is important for documentation related to security features.

[sssd-bot]

The pull request was accepted by @alexey-tikhonov with the following PR CI status:

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🟢 CodeQL (success)
🟢 Build / make-distcheck (success)
🟢 ci / prepare (success)
🟢 ci / system (centos-8) (success)
🟢 Static code analysis / codeql (success)
🟢 Static code analysis / pre-commit (success)
🟢 Static code analysis / python-system-tests (success)

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