XEP-0412: XMPP Compliance Suites 2019

[Neustradamus]

Please add support of https://xmpp.org/extensions/xep-0412.html

Which replaces:

• XEP-0387: XMPP Compliance Suites 2018: https://xmpp.org/extensions/xep-0387.html
• XEP-0375: XMPP Compliance Suites 2016: https://xmpp.org/extensions/xep-0375.html
• XEP-0302: XMPP Compliance Suites 2012: https://xmpp.org/extensions/xep-0302.html
• XEP-0270: XMPP Compliance Suites 2010: https://xmpp.org/extensions/xep-0270.html
• XEP-0242: XMPP Compliance Suites 2009: https://xmpp.org/extensions/xep-0242.html

[Kaffeine]

The issue is not valid (telepathy-qt has nothing to do with XMPP). Issues in telepathy-gabble and telepathy-nonsense are OK.