[openssl-dev] [openssl.org #3742] Support s_client -starttls to xmpp server-to-server ports

[Kai Engert via RT]

I'd like to be able to use openssl s_client to diagnose SSL/TLS
connections to XMPP/Jabber servers.

There are two types of xmpp server ports:
(a) those that are used for connections from clients,
    usually port 5222 (c2s).
(b) those that are used for connections from server to server,
    usually port 5269 (s2s).

As of today, the -starttls xmpp option supports only (a).

In order to support (b), the pre-starttls handshake must be slightly
different.

Attached is a patch that implements -starttls xmpp-server



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