[pvrusb2] Device naming

[Rafi Rubin]

I'm playing with different tuners and have been thinking about the 
confusion of using mythtv with non-equivalent devices.  And so I was 
thinking it would be nice to have something generate symlinks or 
something to provide device names that are a bit more specific than 
"video0", particularly since I may not be able to garuntee the order the 
devices are plugged in.

Do any of you have any experience with this sort of thing?

Here's an nice example.  I'm not entirely sure if the /dev/disk tree is 
generated by the kernel, hal, udev, or some weird combination.  The 
point is, you get a canonical name which is specific to that particular 
device or partition.

$ ls /dev/disk
by-id  by-label  by-path  by-uuid
$ ls /dev/disk/by-id
ata-IC25N080ATMR04-0_MRG489K4JT6LHH
ata-IC25N080ATMR04-0_MRG489K4JT6LHH-part1
ata-IC25N080ATMR04-0_MRG489K4JT6LHH-part2
ata-IC25N080ATMR04-0_MRG489K4JT6LHH-part3
ata-IC25N080ATMR04-0_MRG489K4JT6LHH-part4
$ ls /dev/disk/by-label
main  spare