Add GTC support to knetworkmanager

[Kevin Kofler]

Ravi wrote:
> Ok. Based on lamarque's comments on
>   http://lamarque-lvs.blogspot.com/2010/05/plasma-nm-more-updates.html
> regarding knetworkmanager deprecation, this is probably a fruitless
> endeavor. I'll look into a similar patch for the plasmoid.

AFAICT, the patch actually touches the common code, so it should add this 
support for both the monolithic KNetworkManager and the plasmoid.

        Kevin Kofler