A special meta-port to do nothing but register dependencies on those
ports you specifically want to have installed. The normal dependency
checking in programs like pkg_delete(1) will prevent easy deletion of
ports that other ports depend on. Keeps egg off face. Protects feet
from being shot.
Submitted by: Matthew Seaman <m.seaman at infracaninophile.co.uk>
Approved by: tabthorpe (mentor)