[nmglug] testing a nmglug room on matrix

[Mark Galassi]

Hey, let me clarify: jitsi is how we meet in videocon.

matrix is just for online chat.  not for videocon.

I created a second room called nmglug-room because the first one was created with their annoying security "thing".  I have invited anyone who has posted to nmglug recently; email me if you want an invite, and maybe at some point we can also add the whole list.