Update inline documentation for hooks in wp-admin/includes/ms.php.

props jamescollins.
see #25229.
Built from https://develop.svn.wordpress.org/trunk@25486


git-svn-id: http://core.svn.wordpress.org/trunk@25407 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use wp_parse_id_list() to parse the 'network_id' parameter in wp_get_sites().

props jamescollins.
see #14511.
Built from https://develop.svn.wordpress.org/trunk@25487


git-svn-id: http://core.svn.wordpress.org/trunk@25408 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Merge remote-tracking branch 'upstream/master'