feat: update rustls to 0.21.0 and tokio-rustls to 0.24

[CGQAQ]

With rustls 0.21.0 release see: https://www.memorysafety.org/blog/rustls-new-features/, two new features cames along:

The first big feature is support for TLS certificates containing IP addresses. Rustls can now be used to set up TLS connections addressed by IP rather than a domain name. This is useful for things like Kubernetes pods, which often use IP addresses instead of domain names, and for DNS over HTTPS/TLS which need an IP address for the server to avoid circular dependency on name resolution. TLS certificates for IP addresses have been the most heavily requested feature for quite a while now and it's great to have it completed.

The second big feature is support for RFC8446 C.4 client tracking prevention. This means that passive network observers will no longer be able to correlate connections from ticket reuse.

This PR upgrades both rumqttc and rumqttd's rustls to version 0.21.0

Type of change

Checklist:

• Formatted with cargo fmt
• Make an entry to CHANGELOG.md if its relevant of user of the library. If its not relevant mention why.

Blocking:

• : feat: upgrade tokio-rustls to 0.24 sdroege/async-tungstenite#116
• : feat: upgrade async-tungstenite to 0.22 najamelan/ws_stream_tungstenite#10

[h3nill]

I am seeing some errors related to having 2 versions of tokio-rustls creating conflicts (async-tungstenite has a dependency on version 0.23).

You can see the error when you enable websocket feature, for e.g. cargo c --features websocket.

[CGQAQ]

I am seeing some errors related to having 2 versions of tokio-rustls creating conflicts (async-tungstenite has a dependency on version 0.23).

You can see the error when you enable websocket feature, for e.g. cargo c --features websocket.

I'll check it out, sorry for late response

[CGQAQ]

BLOCKINGS:

• : feat: upgrade tokio-rustls to 0.24 sdroege/async-tungstenite#116
• : feat: upgrade async-tungstenite to 0.22 najamelan/ws_stream_tungstenite#10

[CGQAQ]

@henil After these two PRs merged, I think it's ready to merge this PR

BLOCKINGS:

• : feat: upgrade tokio-rustls to 0.24 sdroege/async-tungstenite#116
• : feat: upgrade async-tungstenite to 0.22 najamelan/ws_stream_tungstenite#10

[CGQAQ]

@henil please take a look

[h3nill]

LGTM, Thank you @CGQAQ!

[h3nill]

Actually @CGQAQ can you add back webpki error variants, removing them is a breaking change. We can remove them in future if they are not required. I cannot push it to this branch. ref: d46bc1a

[CGQAQ]

Actually @CGQAQ can you add back webpki error variants, removing them is a breaking change. We can remove them in future if they are not required. I cannot push it to this branch. ref: d46bc1a

@CGQAQ added back