Keep redirect_to when hitting the log out AYS.

props mitchoyoshitaka for initial patch.
fixes #17398.


git-svn-id: https://develop.svn.wordpress.org/trunk@27272 602fd350-edb4-49c9-b593-d223f7449a82
Remove unused routing code in revisions.

props adamsilverstein.
fixes #26565.


git-svn-id: https://develop.svn.wordpress.org/trunk@27273 602fd350-edb4-49c9-b593-d223f7449a82