Mark Nelson b65bfc8ab4 MDL-63211 core: upgrade to remove duplicate contacts
Remove any duplicate rows - from now on adding contacts just requires 1 row.
The person who made the contact request (userid) and the person who approved
it (contactid). Upgrade the table so that the first person to add the contact
was the one who made the request.
2018-09-28 10:19:57 +08:00
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