When parsing the main query, if `s` is set to empty: `?s=` and `$this->is_main_query() && array_key_exists( 's', $this->query )` - kill the query instead of loading the homepage. This will load the search page with no results.

Fixes #11330.



git-svn-id: https://develop.svn.wordpress.org/trunk@28612 602fd350-edb4-49c9-b593-d223f7449a82