Recognise delayed channels when scheduling

[chis]

In NZ a few of our TV channels have a +1 channel that's exactly the same, just 1 hour later. Anything you've just missed in real time you can see on the +1 channel.

My suggestion is that Argus recognises that the same shows for recording are on several different channels:
1. When deciding which to record, optimise across the normal and +1 channels so that the most are successfully recorded.
2. When the recorder first starts (say due to hardware failure or a reboot of some sort), re-optimise the immediate future schedule so that any programs just missed but available on the +1 channels get recorded.