Permanent link on /exonerator.html? is http

When results are displayed for a a given IP in ExoneraTor, the permanent link section gives the link in HTTP.

Although the endpoint redirects to HTTPS, it's still desirable to show the HTTPS link in the first place. [Screenshot-attached]

Example: https://metrics.torproject.org/exonerator.html?ip=62.138.7.171&timestamp=2018-09-20&lang=en

Trac:
Username: modik

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