[sshd] add @Tjzabel as authorized user to irc-lug.rit.edu

[jwflory]

This is an old action item I've had on my plate, but this PR adds @Tjzabel as an authorized user to the irc-lug.rit.edu host. This change is tested and also deployed to production already.

---

Needs testing

@Tjzabel: are you able to SSH into the machine now?

Details

Sort of interesting how I did this. Originally, I had a global target user defined for this entire repository, but I am realizing this doesn't scale. I tried out something new and added some variables to the sshd role with a list of authorized users and their SSH public keys. Then I loop through the list in the role's tasks, and ta-da! It works.

Something I am wondering: does it make more sense to define these users globally or only in this specific role? Probably yes, since @Tjzabel isn't a member of the teleirc or matterbridge groups, which grant read/write privileges to private files in the deployment directories. I'll try and get that in a future PR.

[Tjzabel]

@jwflory Thanks for doing this! I will test this out over the weekend, and let you know the results.

[jwflory]

@Tjzabel Ping – were you able to SSH into the machine?

[jwflory]

I have a new change coming in that is based off of this. I have good reason to believe this change is in place. I'm merging this PR. 🎬