Fix email unsubscribe #1539

Closes #1539 (closed)

Depends on minds!182 (merged)

Summary

Email unsubscribe link is currently not working.

Steps

1. Fire an email off. Locally I used php cli.php Email testWeMissYou --guid=':guid' --send true --output='email.html' then checked the output html - unsure if you can check the remote filesystem in a browser so may have to copy the content off of the sandbox, into a local file, then check that.

Alternatively, fire off a random email.

2. Check the footer visually.
3. Click the unsubscribe link.
4. The link will take you to minds.com, so grab it out of your history or undo in your address bar if your browser supports it.
5. Switch the domain to the sandbox domain rather than prod.
6. It should show you are unsubscribed from the email.
7. Add a random number in the GUID, it should show an error.

Regression scope

Feature is already broken so not likely much in the way of regressions on this change - the nginx changes in minds/minds are also pretty straightforward.