feature-test tool location needs to be determined by its associated
variable; otherwise, the tool is not found on Windows:
setup.sh: line 22: ../feature-test: No such file or directory
(cherry picked from commit
102f01263125bfb4676e7fea6bfeb3edb19f8ae1)
copy_setports ns2/named.conf.in ns2/named.conf
copy_setports ns3/named.conf.in ns3/named.conf
-if ../feature-test --enable-dnstap
+if $FEATURETEST --enable-dnstap
then
cat <<'EOF' > ns3/dnstap.conf
dnstap-identity "ns3";