force rebuild a port

[Riccardo Mottola]

Hi Richard,

Richard L. Hamilton wrote:
> port -n upgrade --force --no-rev-upgrade crankyport
> 
> It might not work if crankyport needs the latest of something it depends on and that isn't already up-to-date. But a lot of times, it does work.

this is a good one.. appears to work for stubborn libgdk, it just rebuilt

I prefer it to build/uninstall/install because upgrade preserves the
automatic status and variants automagically.

Riccardo