Update phpdoc for get_current_site(). props jeremyfelt. fixes #25040.

git-svn-id: https://develop.svn.wordpress.org/trunk@25229 602fd350-edb4-49c9-b593-d223f7449a82
Add phpdoc for 'wp_redirect' and 'wp_redirect_status' filters. props DrewAPicture. fixes #25215.

git-svn-id: https://develop.svn.wordpress.org/trunk@25230 602fd350-edb4-49c9-b593-d223f7449a82