PHPDoc fixes for functionality in wp-includes/wp-db.php added in 3.9.

See #27700.


git-svn-id: https://develop.svn.wordpress.org/trunk@28016 602fd350-edb4-49c9-b593-d223f7449a82
Improve hook docs for the `resetpass_form` hook added in 3.9.

See #21044, #27700.


git-svn-id: https://develop.svn.wordpress.org/trunk@28017 602fd350-edb4-49c9-b593-d223f7449a82