Inline documentation for hooks in wp-admin/network.php.

Props johnafish.
Fixes #25502.

Built from https://develop.svn.wordpress.org/trunk@25722


git-svn-id: http://core.svn.wordpress.org/trunk@25635 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline documentation for hooks in wp-includes/class-oembed.php.

Props swissspidy, kpdesign.
Fixes #25527.

Built from https://develop.svn.wordpress.org/trunk@25723


git-svn-id: http://core.svn.wordpress.org/trunk@25636 1a063a9b-81f0-0310-95a4-ce76da25c4cd