DISPLAYGROUP fails in analysis.cfg

On Fri, 1 Feb 2019, Jeremy Laidman wrote:

Very nice detective work, Dave. Have you re-compiled with adjustments and re-tested?

Nope.  We're running ours from Debian packages, so I'm several steps 
removed from that level of testing.  I was hoping someone would be able to 
confirm more easily.  If not, I'll work on it as time allows.