Openssl/vendored feature for perseus-cli

[arctic-hen7]

To be clear, does this solve the problem because there's some dependency that uses openssl, and adding a direct dependency on it with this feature causes everything to work out?

[iRaiko]

By default reqwest will use system-native transport layer, and the default for linux is openssl (as per reqwest). Features are additive so having this as an optional dependency will enable that feature for the crates that do use it. In my case, inside a docker container, the cargo install perseus-cli was not working because of openssl (I got the libssl-dev files, and set the enviroment variables), and with making it vendored it was working

[arctic-hen7]

Perfect, that's what I thought, just wanted to make sure I understand. Because it's a bit obscure for developers new to Rust, do you want to add a little comment explaining that?

[martadinata666]

The openssl vendored feature, make it build openssl from source like the scripts/build_openssh_musl.sh but correct way. Instead relying on libssl-dev package, when on xxxx-unknown-linux-gnu detected correctly, it more complicated on musl target.

Or even better if move to rustls that entirely remove system/host deps on libssl-dev

[arctic-hen7]

@iRaiko did you want to add that explanatory comment?