Jeremy Felt 576a4cba5e Multisite: Use get_networks() in get_main_network_id().
The manual query for the main network ID can now be replaced with a cached `get_networks()` query. This allows us to eliminate the `primary_network_id` cache key entirely.

Props spacedmonkey.
Fixes #37218.


git-svn-id: https://develop.svn.wordpress.org/trunk@38632 602fd350-edb4-49c9-b593-d223f7449a82
2016-09-20 18:46:52 +00:00
2016-09-06 18:12:09 +00:00
2016-08-02 13:44:37 +00:00
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