chore: upgrade to rustls 0.20

[ry]

rustls 0.20 is a very large API change.

Dependencies:

• Upgrade to rustls 0.20 snapview/tokio-tungstenite#198
• Port reqwest to rustls 0.20 seanmonstar/reqwest#1363
• Rustls 0.20 and HttpsConnectorBuilder rustls/hyper-rustls#156

[piscisaureus]

• I would like to land feat(ext/net): add TlsConn.handshake() #12467 before attempting to upgrade ext/net to use rustls 0.20
• Our websocket implementation uses tokio-tungstenite, but it can also use our own TlsStream from ext/net. So no need to make an effort to port over tokio-tungstenite.

[satyarohith]

All the dependencies are now upgraded to rustls 0.20.

[realtimetodie]

Please update reqwest as well, as they switched to rustls 0.20.x in 0.11.7.

[piscisaureus]

@bartlomieju
I fixed the TlsStreamInner::poll_io() state machine so most tests pass now.
I believe the remaining issue is related to ALPN support.

[bartlomieju]

@bartlomieju I fixed the TlsStreamInner::poll_io() state machine so most tests pass now. I believe the remaining issue is related to ALPN support.

Thank you, I will fix the rest.

[piscisaureus]

@bartlomieju
It is green now but I think the PR still needs a final cleanup.
There's still this duplicated code, a todo!() comment, probably more.

[bartlomieju]

@bartlomieju It is green now but I think the PR still needs a final cleanup. There's still this duplicated code, a todo!() comment, probably more.

Sure, I'll handle that tomorrow.

[bartlomieju]

@piscisaureus I addressed todo!() and removed some duplication of code (not all, but I left relevant comments as to why that is happening). Please review.

[piscisaureus]

LGTM, some nits.