jeremyfelt e0ef4132fe Multisite: Provide $join as a possible SQL clause to the sites_clauses filter.
Previously, `compact()` provided a non existent `$join` and could cause confusion for anyone attempting to extend `WP_Site_Query` with their own tables. This aligns with the current behavior in `WP_Network_Query`.

Props johnjamesjacoby.
Fixes #37922.


git-svn-id: https://develop.svn.wordpress.org/trunk@38631 602fd350-edb4-49c9-b593-d223f7449a82
2016-09-20 17:48:42 +00:00
2016-09-06 18:12:09 +00:00
2016-08-02 13:44:37 +00:00
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