If we cannot find the package distfile that we want in the distfile cache in the local directory
/freenas/Dev/releng/FreeNAS/ports/distfiles/ ,
then look in the remote distfile cache at http://download.freenas.org/distfiles/

This package remote distfile cache on download.freenas.org will be populated by a Jenkins job internally at iXsystems.
Frequently, people outside of the iXsystems network who use github to fetch the FreeNAS sources,
but do not have access to our internal /freenas/Dev/releng/FreeNAS/ports/distfiles/ directory,
run into build errors because of missing distfiles.

This should eliminate that problem.