Dion Hulse bbbf6eab8a Canonical / Query: Restore the is_404() check in wp_old_slug_redirect() which was removed in [34659].
This reverts part of [34659] due to excessive canonical problems it's caused in 4.4.x.

Fixes #35344, #21602 for the 4.4 branch.


git-svn-id: https://develop.svn.wordpress.org/branches/4.4@36280 602fd350-edb4-49c9-b593-d223f7449a82
2016-01-13 08:19:48 +00:00
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