[mythtv] UK DVB-T transmissions - NIT should not be trusted.

[jim]

For information wrt UK DVB-T broadcasts - Stuarts recent scanning changes 
mean this has no impact on current svn - but in case it affects any other 
work:

I chased up the BBC to find out why the MoelYParc NIT was no longer 
correct (It uses frequencies different from those shown in the NIT & the 
NIT has lost the alternate frequency list.) 

The response I got was:  
"We have removed the alternative frequency flag and the other frequency
listings. These will stay removed for the time being and foreseeable
future."

(The beeb don't own the transmission network - its outsourced)

They called me back to follow this up and the reason is apparently that 
the increasing number of transmitters means that the information in the 
NIT is too much for several cards/solutions in the marketplace so it has 
been removed.

This means that for most transmitters in the UK the NIT is useless and 
should be ignored.