Bug#994504: [Aptitude-devel] Bug#994504: Bug#994504: Don't just say "not a real package"

[積丹尼 Dan Jacobson]

Also the user is curious where these determinations are drawn from.
It would be nice if aptitude said "Based on /var/lib/dpkg/status, this
package is a ephemeral / virtual / refereed etc. package."