[mythtv] Mini patch: DVB Pids

[Edward Wildgoose]

> By looking how you are renaming the columns, it's clear to me how to map
> them, btw, are you willing to update mythchannels code accoirdingly?

Already done.

> About "cvs.sql", maybe will be a good idea to take out the lines where the
> pids columns names are renamed in the case that a previous mythchannels
was
> applied and have them in a separate script for those who need that
migration
> path. When a single statement fails the sql script doesn't execute the
> following statements, so we should keep cvs.sql clean and working for
those
> who are just upgrading from CVS.

Could do, doesn't seem to do any harm as is though?  Users should be running
"mysql -f" anyway to pick up any new stuff.