Add migration guide entries for proxy-from-env and native-certs feature flags

[michaeljones]

I'm migrating from 2 to 3 and wondering what to do about the fact that proxy-from-env and native-certs are no longer feature flags.

Would it be possible to add sections in the migration guide about them if specific steps need to be taken? They are trickier things to test in our application code base so I'm a bit nervous about it. I don't want to burden you though so only makes sense to do it if you think it'll serve the project, of course.

Thanks again for ureq.

Oh, one of the things I did get caught out by in the migration is around ureq::OrAnyStatus. I first thought you couldn't set it on a per-request basis but only through the agent config but I have since found the config method on the RequestBuilder. I can try to add a section to the guide about that if that would be useful?

[algesten]

Great questions!

I'm migrating from 2 to 3 and wondering what to do about the fact that proxy-from-env and native-certs are no longer feature flags.

• proxy-from-env is the default now. CONNECT-proxy needs no extra feature flag, but socks-proxy does.
• native-certs is built-in. In the TlsConfig, which you can set on agent or request level, you have three choices via the RootCerts enum. Specific when you want to set the root certs yourself, PlatformVerifier, which for rustls delegates to the system, and for native-tls means using the root certs native-tls is picking up (this is what you want), and finally WebPki, which uses the root certs bundled with ureq.

Would it be possible to add sections in the migration guide about them if specific steps need to be taken?

Sure, let's document it!

Oh, one of the things I did get caught out by in the migration is around ureq::OrAnyStatus. I first thought you couldn't set it on a per-request basis but only through the agent config but I have since found the config method on the RequestBuilder. I can try to add a section to the guide about that if that would be useful?

Yes please!

A PR documenting all of this would be most welcome!