Support reading with blocking sockets

[arb000r]

Hello,

Back with a change that would aid a little bit of local development support on macOS.
I understand that boomnet is not intended to be used with blocking sockets, and probably definitely not with macOS, and if you feel that this change is against the spirit of the crate, feel free to close.

This change adjusts the complete_io function to remedy blocking sockets stalling during the read process.

I thought maybe a feature would be more appropriate compared to use the target_os flag.

[HaveFunTrading]

hi @arb000r

the issue is with tls stream implementation for rustls backed. If you switch to openssl backend you can use it with a blocking socket.

I will look to address this bug when I have some more time, I think your PR is already trying to fix it.

[HaveFunTrading]

This has now been fixed in 0.0.76. Let me know if you still experience any issue.

[arb000r]

thanks!