XEP-0388: Extensible SASL Profile support

[Neustradamus]

Dear @processone team,

Can you add "XEP-0388: Extensible SASL Profile" support?

• https://xmpp.org/extensions/xep-0388.html

Thanks in advance.

Linked to:

• https://github.com/processone/xmpp/issues/69
• https://github.com/processone/xmpp/issues/39
• https://github.com/processone/ejabberd/issues/2742
• https://github.com/processone/ejabberd-contrib/issues/279
• https://github.com/processone/ejabberd/issues/3972
• https://github.com/processone/ejabberd/issues/4112
• https://github.com/processone/ejabberd/issues/4105
• https://github.com/processone/ejabberd/issues/4107