Improve comments for get_comment_author_link()

[nofearinc]

Currently, the get_comment_author_link() function in wp-includes/comment-template.php has a TODO for conditionals to be added while calling get_comment_author_url() and get_comment_author(). Since both functions use get_comment() to fetch the object and when the comment_ID function argument is empty, it falls back to the global comment object, we could update the comments and shed light on the actions that are to be executed.

[nofearinc]

comment template comments enhancement

[DrewAPicture]

In 25494:

Clarify phpdoc for get_comment_author_link().

props nofearinc. Fixes #24508.