Crypto domains should be exempted from automatic HTTPS upgrades

[fmarier]

Brave supports a number of crypto domain name systems both for Wallet, but also for navigations via the URL bar or links.

These domains are unlikely to be able to acquire valid HTTPS certificates. Therefore we should disable automatic HTTPS upgrades for them.

[fmarier]

@arthuredelstein Feel free to close if we already exclude these TLDs.

[arthuredelstein]

These aren't explicitly excluded, but it may be that they already fall back automatically to HTTP. We should test what the current behavior is.