RFC 9266: Channel Bindings for TLS 1.3 support

[Neustradamus]

Can you add the support of RFC 9266: Channel Bindings for TLS 1.3?

• https://datatracker.ietf.org/doc/html/rfc9266

Little details, to know easily:

• tls-unique for TLS =< 1.2
• tls-server-end-point
• tls-exporter for TLS = 1.3

Thanks in advance.

Linked to:

• #39
• processone/ejabberd#2742
• processone/ejabberd-contrib#279
• processone/ejabberd#3971
• processone/ejabberd#3972
• processone/ejabberd#4112
• processone/ejabberd#4105

[Neustradamus]

@prefiks: Thanks a lot for your SCRAM security improvements!

Linked to:

• processone/ejabberd@0bdca8f
• processone/ejabberd@3ed2b41
• processone/ejabberd@3ad30c3
• processone/fast_tls@c98c1a7
• 45c7128
• 3a123f2
• cf85410
• 307deb6