Log Message:
Bump PKGREVISION, because location of freetds provided shared library
was changed in recent freetds installation change.

Remove subdirectory "freetds" from the buildlink directory used
during build.

Get rid of forced "BUILDLINK_DEPENDS.freetds=freetds-0.61*". This
dated back over two years ago to initial import of this package
which was one month after freetds was updated from 0.60 to 0.61.
This package appears to build and package fine (using py23-sybase-0.36nb3
and python23-2.3.5nb5 today).