Add a new environment variable "RECOLL_ACTIVE_EXTRA_DBS", which helps

choose the active external indexes list.

tests/program/program.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+topdir=`dirname $0`/..
+. $topdir/shared.sh
+
+initvariables $0
+
+(
+  recollq '"maps image file tags to xapian tags"'
+  recollq '"PMC = Performance Monitor Control MSR"'
+  recollq shellscriptUUnique
+) 2> $mystderr | egrep -v '^Recoll query: ' > $mystdout
+
+diff -w ${myname}.txt $mystdout > $mydiffs 2>&1
+
+checkresult