Concerning pkgng

[Montgomery-Smith, Stephen]

So I have started using pkgng.  It is extremely easy to convert, it runs
very fast, and I really like it.

However, it would be nice if the old pkg_install, pkg_info, etc programs
were somehow disabled on FreeBSD-8.  Maybe they could look inside
/etc/make.conf and see if /var/db/pkg/local.sqlite exists, and then
decide not to operate.

The reason for this is because I can easily see me accidentally doing
pkg_delete instead of pkg delete.  And especially since pkg convert
seems to leave all the old directories in /var/db/pkg, I can see this
creating quite a mess.

I know I can simply delete the pkg_delete, pkg_info binaries.  But I'll
have to remember to do that each time I remake world.