Gatonito questions

• How to get a hex string from Rust's MD-5 (MD5) crate?
• Is there a way to implement the same thing for lots of structs automatically?
• What does use crate::body::Body; mean?
• What is the smallest feature set to enable polling a future with Tokio?
• What does "See [H4.3]" means in an RFC?
• Is this mem::transmute::<&str, &'static str>(k) safe?
• Can I use await inside async recursive functions?
• How to represent this utf-8 encoded string in Rust?
• Why do some devs use mod tests for tests?
• async function: the trait `std::marker::Send` is not implemented for `std::sync::MutexGuard<'_, Client>`

Gatonito answers