Comment 10 for bug 681002

OK, I think I fixed this. Basically, Deja Dup never needs to use a gpg agent, and using an agent isn't even enabled in gpg by default normally. But it is enable as a global default on (at least) Ubuntu.

I'm not sure why sometimes the agent likes to complain about a bad CA certificate, but regardless. I've now made Deja Dup pass the --no-use-agent flag to gpg. That will avoid this point of failure in the future.