Use Usenet.Custom library instead of Usenet

[pannal]

This uses Usenet.Custom from https://github.com/pannal/Usenet which adds:

• Allow ignoring all RemoteCertificateNameMismatch by supplying the environment variable NZBDAV_NNTP_TLS_IGNORE_NAME_MISMATCH=true
• Allow ignoring specific RemoteCertificateNameMismatch by supplying the environment variable NZBDAV_NNTP_TLS_IGNORE_HOSTS=host1[,;]host2[,;]..

I think this whole project should switch to https://github.com/Spottarr/Usenet, though!

[nzbdav-dev]

I recently published the following two nuget packages to replace the keimpema/Usenet library nzbdav's been using:

• https://www.nuget.org/packages/UsenetSharp
• https://www.nuget.org/packages/RapidYencSharp

I still haven't integrated them onto nzbdav yet though.

[pannal]

OK, fair enough. Why aren't they open source, though? I'd like to take a look at the UsenetSharp library to check for the SSL handling.

[nzbdav-dev]

They're in a private repo, since I'm still making changes to the interface. But I'll make the repos public before integrating them onto nzbdav

[nzbdav-dev]

@pannal , I added you as a collaborator to https://github.com/nzbdav-dev/UsenetSharp if you want to start taking an early look.

Btw, what's your use-case for ignoring RemoteCertificateNameMismatch? What's the motivation behind it?

[pannal]

Btw, what's your use-case for ignoring RemoteCertificateNameMismatch? What's the motivation behind it?

I proxy nntp via Socat on a different machine. That invalidates that portion of the certificate chain, though. The chain is still valid and trusted from my point of view (as I control the entrypoint), but the domain/IP doesn't match the original provider's common name anymore.

[pannal]

Superseded by: nzbdav-dev/UsenetSharp#2

[pannal]

Hey, could you take a look at my (pretty small) pull request on UsenetSharp, please? Thank you!