Use HTTPS if available

[nmaytan]

This change makes a newly created Tiled client switch to HTTPS, if available, if constructed using an HTTP argument as parameter.

This serves two purposes:

• Prevents that client from hitting an HTTP->HTTPS redirect on every request
• Prevents certain requests from breaking for clients created using an HTTP URL (such as a POST when redirects are setup to give 301 responses)

For example, here is a POST request to logout resulting in only one POST request, instead of a POST followed by redirected GET as would happen if HTTP were used:

In [4]: c = from_uri("http://tiled.nsls2.bnl.gov")

[...]

In [5]: c.logout()
14:57:39.140 -> (204 B) POST 'https://tiled.nsls2.bnl.gov/api/v1/auth/session/revoke' 'host:tiled.nsls2.bnl.gov' 'accept:*/*' [...]

Checklist

• Add a Changelog entry
• Add the ticket number which this PR closes to the comment section