Dominik Schilling cf5df5a7ce Schema: Add an index to wp_users.user_email.
Improves lookup of an email address on large user tables.

See #9568.
Fixes #33376.
Built from https://develop.svn.wordpress.org/trunk@36654


git-svn-id: http://core.svn.wordpress.org/trunk@36621 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-02-23 23:21:26 +00:00
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