* Fix formatting for nightly rustfmt
https://github.com/LemmyNet/lemmy/issues/3467
* Fix regex error when actix-web feature not enabled
If the crate is built with only the axum feature, compiling the
webfinger account regex will fail with an error "Unicode-aware case
insensitivity matching is not available..." because of the missing
unicode-case feature. This doesn't happen if actix is installed because
it pulls in the regex crate with all features (via [actix-router][0]).
The failure can be demonstrated by reverting this commit's change to
Cargo.toml and running:
cargo test --no-default-features --features=axum --doc extract_webfinger_name
Resolve this by adding the unicode-case feature to the regex dependency.
[0]: 0e8ed50e3a/actix-router/Cargo.toml (L25)
* Remove `actix-rt` and replace with tokio tasks
* Include activity queue test
* Use older `Arc` method
* Refactor to not re-process PEM data on each request
* Add retry queue and spawn tokio tasks directly
* Fix doc error
* Remove semaphore and use join set for backpressure
* Fix debug issue with multiple mailboxes
