Log Message:
ham/hamlib: Recover from using a github distfile

The distfile from github is currently broken, or has been attacked,
and our distinfo scheme caught that.  Or perhaps it was always not ok.
Switch to sourceforge which serves a file that has a sensible diff
from 4.3.1 and matches the distinfo I generated earlier.

No change to binary package, but PKGREVISION++ because of MASTER_SITES change.