Inline documentation for hooks in wp-admin/includes/schema.php.

Props johnafish, kpdesign.
Fixes #25498.

Built from https://develop.svn.wordpress.org/trunk@25938


git-svn-id: http://core.svn.wordpress.org/trunk@25897 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline documentation for hooks in wp-admin/network/site-users.php.

Props sboisvert for the initial patch. Props kpdesign.
Fixes #25497.

Built from https://develop.svn.wordpress.org/trunk@25939


git-svn-id: http://core.svn.wordpress.org/trunk@25898 1a063a9b-81f0-0310-95a4-ce76da25c4cd