Twenty Fifteen: Update some more bundled theme references after [29895].

see #29799.

git-svn-id: https://develop.svn.wordpress.org/trunk@29900 602fd350-edb4-49c9-b593-d223f7449a82
Support nested tax query syntax in redirect_canonical().

The proper place to look for a list of queried terms is in the flat
queried_terms array, not in tax_query->queries.

See #29738.

git-svn-id: https://develop.svn.wordpress.org/trunk@29901 602fd350-edb4-49c9-b593-d223f7449a82