MFH: r487269

Add pkg-message instructions to fix geoiplookup with the free databases

GeoIP has free and paid databases with differing granularity. The
geoiplookup and geoiplookup6 tools look only for the paid databases.
Users with the free databases (as would be obtained through the
included geoipupdate.sh script, or though specification of free
data files in net/geoipupdate) will need to create symlinks to
enable those tools to work with the free database files.

The upstream NEWS.md enumerates those symlinks, so this patch includes
a link to that file in the upstream repo.

PORTREVISION bump for the pkg-message change.

PR: 233947
Reported by: Vincent Milum

Approved by: portmgr (with hat)