[mythtv] Update of contrib/mythname.pl

[Behan Webster]

Michael T. Dean wrote:

>
> Also, patches are preferred (created with "svn diff" or "diff -u") so
> it's obvious what you changed and what stays the same.
>
I've already done so at Kevin's request.

Since it was almost a complete rewrite, with the diff being over 2k
bigger than the new script, it seemed a bit pointless...

But, I'm game.

Either way I've got the functionality I was looking for.