Make mythfilldatabase Run Automatically

Mythfilldatabase is supposed to run automatically, but it wasn't happening on my new myth-0.21 setup. I found the answer on this page: Although it is the backend that is in charge of running mythfilldatabase automatically, the checkbox to activate it is in the frontend config! I'm pretty sure that this checkbox was in the backend config in 0.20, and it doesn't make a lot of sense to me that it's now in the frontend. But, whatever. It works now.

Oh, and that page also pointed me to a perl script that will download icons for all of the channels in your lineup. Although, the name of the script has apparently changed, because it's called channel_icons.pl on my system. For some bizarre reason, the perl script was gzipped on disk, so I had to gunzip it before running it. Come on, people, it's only 21kB unzipped! I think my disk can handle it. Anyway, once I gunzipped it, I invoked it like: perl /usr/share/doc/mythtv-backend/contrib/ icons/master_iconmap/channel_icons.pl --find-missing --rescan. It worked like a charm, but I had to manually search for many of the channels.