[$] A Matrix overview

At this year's (virtual) OpenSource Summit Europe, Oleg Fiksel gave an overviewtalk on the Matrix decentralized,secure communication network project. Matrix has been seeing increasingadoption recently, he said, including by governments (beyond France, whichwe already reported on in an article on a FOSDEM2019 talk) and other organizations. It also aims to bridge all of thedifferent chat mechanisms that people are using in order to provide aunified interface for all of them.