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

Props Hanni.
Fixes #26216.

Built from https://develop.svn.wordpress.org/trunk@26913


git-svn-id: http://core.svn.wordpress.org/trunk@26794 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline documentation for hooks in wp-admin/network/upgrade.php.

Props miyauchi for the initial patch.
Fixes #25881.

Built from https://develop.svn.wordpress.org/trunk@26914


git-svn-id: http://core.svn.wordpress.org/trunk@26795 1a063a9b-81f0-0310-95a4-ce76da25c4cd