Reqwest uses rustls not openssl

[illicitonion]

Pure rust means easier compiling, easier linking, and fewer environmental restrictions.

[cosmicexplorer]

Pure rust means easier compiling, easier linking, and fewer environmental restrictions.

Not when I'm done with the native code support!

I would be surprised if this change affected the failing tests -- if this isn't already that looks like we need to add a comment to #6782 or something?

[illicitonion]

This PR does cause those tests to fail, for interesting reasons...

Those tests assert that nothing is logged to stderr, and with this PR, some rust logging is happening to stderr in the HTTP stack.

This opens up two interesting questions:

1. Should those tests be asserting on stderr? Asserting that no logging happened is a fairly blunt assertion.
2. Do we want this logging?

I think the right thing to do here is probably to tone down rust logging from 3rdparty crates, so that by default we don't log things from outside our code unless we're in trace mode. I'll do a little investigation, but may hold off on this until #6817 lands because that's a natural place from which to build more logging granularity :)

[stuhood]

Huzzah!