Use wp_parse_id_list() to parse the 'network_id' parameter in wp_get_sites().

props jamescollins.
see #14511.
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git-svn-id: http://core.svn.wordpress.org/trunk@25408 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce 'offset' parameter for wp_get_sites().

props jamescollins.
see #14511.
Built from https://develop.svn.wordpress.org/trunk@25488


git-svn-id: http://core.svn.wordpress.org/trunk@25409 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update inline documentation for wp_insert_term().

props DrewAPicture.
fixes #22801.
Built from https://develop.svn.wordpress.org/trunk@25489


git-svn-id: http://core.svn.wordpress.org/trunk@25410 1a063a9b-81f0-0310-95a4-ce76da25c4cd