[vdr] no channel update for certain channels

[Matthias Dahl]

Hi.

For certain situations, it'd be great to exclude some channels from the 
automatic channel update. For example, when one has entered a channel manually 
which broadcasts wrong channel informations. With the next channel update, all 
is overwritten. So one has to either completely disable the automatic updates 
or live without the channel for the time being. 

I had just a quick look over the vdr source and figured it wouldn't be too 
hard to come up with a patch to support something like this I guess. So I 
wanted to ask if this new feature would be considered ok for inclusion into 
vdr-1.7.x or if there are reasons against it? Otherwise I would put it on my 
todo list and get to it when I get some time... if no one else does it in the 
meantime that is. :-)

Best regards,
matthias.