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[tlug] Another note to server admins: fix kirakira's cert

(yeah, when I start looking, it's hard to stop)

So, server admins, two things:

* it's nice to have fail2ban watching things, but probably not port 25.  That'll
  shut down malicious probes, sure, but it also keeps things like sslscan from
  showing just how bad the config is.

* self-signed cert that expired in 2012 for  Really?  EFF's
  "Let's Encrypt" is free and so simple that even Mauro Sauco could get it right
  after a few tries.



-- Chris
   GPG key fingerprint A582 1BB2 6E72 49BF D4BA  25B4 E40C 37F9 199C 6964

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