Docs: Clarify behavior in wp_set_auth_cookie().

[rollybueno]

Clarifies the docblock for wp_set_auth_cookie() to better explain how the
$remember parameter works.

• If $remember is true, WordPress sets a persistent cookie (14 days by default,
  filterable with auth_cookie_expiration).
• If $remember is false, WordPress sets a session cookie that ends when the
  browser closes. The auth_cookie_expiration filter still runs (2 days by default),
  but because the cookie’s expire value is 0, it won’t persist.

This update makes the function’s behavior easier for developers to understand.

Trac ticket: https://core.trac.wordpress.org/ticket/63230

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[github-actions]

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Props rollybueno, peterwilsoncc, shailu25.

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[github-actions]

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[peterwilsoncc]

I've added a couple of suggestions inline.

The modified hooks reference is to ensure that they are linked in the developer.wordpress.org site.

[rollybueno]

There are errors on the test unit check for test_wp_insert_post_handle_malformed_post_date, which is unrelated to the patch(only inline docs are updated)

[peterwilsoncc]

Thanks Rolly, this looks good to me.

[shail-mehta]

LGTM👍

[github-actions]

A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 61188
GitHub commit: b289221

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.