It would be a good time saver to have an option to automatically
pkg_delete a package that has no dependencies if it just built and then
install it.

For example:

 p5-XML-Parser-2.31 is already installed - perhaps an older version?
 *** If so, you may use either of:
...

I know we already have make update that will also automatically delete
packages, but it is more dangerous because it recursively deletes.

I want something simple so if it doesn't have any dependency and it just
successfully built then it might as well pkg_delete the old one (since
you are already planning to install again) and then install again.

   Jeremy C. Reed
   http://bsd.reedmedia.net/