Another piece of news (for me, at least). 

Running the "syncevolution --version" command appears to re-start the
/usr/libexec/syncevo-dbus-server in the background, and it actually syncs 10
minutes later (as evidenced by the pop-up message).

After I issue "syncevolution --quiet --print-config memotoo" in another
terminal, it dies in about 10 minutes, as before.

I am not sure if asking for the version of a program should start a background
daemon. Shouldn't it just report the version and exit? Should I file this as a
separate bug?