KDE no longer supprts underscore in host names

[kevin.kofler at chello.at (Kevin Kofler)]

I wrote:
> It's quite easy to add the underscore to the allowed characters in
> qt_check_std3rules and I'm tempted to just do that, standards be darned.
> It's more important to interoperate with the real world and this is a
> regression.

PS: Actually, I'm considering just commenting out the qt_check_std3rules 
call outright.

        Kevin Kofler