Find (or make) an HSTS plugin to help enforce HTTPS connections to Buoys

[fabacab]

The only plugins I've found for this are unvetted:

• HSTS
• LH HSTS

Enforcing HTTPS through HSTS will also reduce the potential confusion for failure to geolocate users, as current Chrome and Firefox versions no longer suppor lt access to the Geolocation API on unsecured domain origins.

Action items for myself or a fellow contributor are:

1. Identify any further HSTS plugin candidates.
2. Audit their codebase.
3. If no suitable plugin exists, create one ourselves.
4. Include the chosen or created plugin in Buoy's suggested complementary plugins list.