build/test compilation error in client when only enabling feature dns-over-https

[alexanderkjall]

Describe the bug

The dns-over-https feature relies on rustls.

To Reproduce
Steps to reproduce the behavior:

In the crates/client/ directory:

$ cargo build --no-default-features --features dns-over-https
   Compiling hickory-client v0.24.0 (/home/capitol/project/hickory-dns/crates/client)
error[E0432]: unresolved import `rustls`
  --> crates/client/src/h2_client_connection.rs:16:5
   |
16 | use rustls::ClientConfig;
   |     ^^^^^^ help: a similar path exists: `hickory_proto::rustls`

For more information about this error, try `rustc --explain E0432`.
error: could not compile `hickory-client` (lib) due to previous error

Expected behavior

that cargo build / cargo test works

System:

• OS: Arch
• Architecture: x86_64
• Version n/a
• rustc version: 1.74.1

Version:
Crate: client
Version: git

Additional context
n/a

[djc]

I think this might be similar to #2066, #2067, #2090?

[alexanderkjall]

Yes, these things might have the same underlying cause. I'm not really familiar enough with the codebase to have an opinion on that.

Feel free to close this if you feel that it's a duplicate :)