Create list of ports to update

[andrew clarke]

On Sun 2017-12-03 17:35:15 UTC+0000, Carmel NY (carmel_ny at outlook.com) wrote:

> It would seem to me that poudriere would provide some native method of
> resolving that question. Other port management utilities like synth do it.

The philosophy behind Poudriere is that it sandboxes everything within jails
and so is not at all interested in what's installed on the jail host, so I
can understand why that feature isn't built in.