Incorrect comment in wp_list_categories()

[SergeyBiryukov]

The comment for getting the posts page URL in wp_list_categories() is incorrect:

// Fallback for the 'All' link is the front page.

If should be "posts page", not "front page".

Introduced in [32292].

[sudar]

Added patch to correct the comment.

[boonebgorges]

In 35291:

Correct inline comment in wp_list_categories().

The fallback link for the 'All' option is 'page_for_posts', not
'page_on_front'. Introduced in [32292].

Props sudar, SergeyBiryukov.
Fixes #34363.

[SergeyBiryukov]

In 35293:

In wp_list_categories(), rewrite a long condition for clarity.

See #34363.