[vdr] Keeping channels.conf FTA only?

[Seppo Ingalsuo <seppo.ingalsuo@iki.fi>]

I hope this is not FAQ stuff -- are there easy ways to keep only FTA 
channels in channels.conf? I like to keep all automatic channel updates 
on for satellites which I'm able receive with my setup but the problem 
is that channels.conf gets bloated by terrible amount of encrypted channels.

Cheers,.
Seppo