cache: turn off QNAME minimization in deeper zones

This matches behavior of kresd <= 1.5.3 - check_empty_nonterms(...)
Currently the iterator is unable to do QNAME minimization in deeper
zones, so switching it off is the only thing to do for now :-/
Fixes #316
15 jobs for short-zone-cut in 7 minutes and 31 seconds (queued for 10 seconds)
latest
Status Job ID Name Coverage
  Build
passed #111803
docker linux amd64
build:clang:linux:amd64

00:00:34

passed #111802
docker linux amd64
build:linux:amd64

00:00:30

 
  Test
passed #111810
docker linux amd64
deckard:linux:amd64

00:06:38

passed #111809
docker
doc

00:00:39

passed #111808
docker linux amd64
installcheck:linux:amd64

00:00:52

passed #111811
docker linux amd64
installcheck:valgrind:linux:amd64

00:01:31

passed #111805
docker
lint:c

00:02:04

failed #111806
docker allowed to fail
lint:clang-scan-build

00:01:00

passed #111804
docker
lint:lua

00:00:23

passed #111814
docker linux amd64
respdiff:iter:tcp:linux:amd64

00:02:22

passed #111815
docker linux amd64
respdiff:iter:tls:linux:amd64

00:02:24

passed #111813
docker linux amd64
respdiff:iter:udp:linux:amd64

00:02:22

passed #111807
docker linux amd64
test:linux:amd64

00:00:47

passed #111812
docker linux amd64
test:linux:amd64:valgrind

00:00:28

 
  Coverage
passed #111816
docker linux amd64
coverage

00:00:16

70.4%
 
Name Stage Failure
failed
lint:clang-scan-build Test
  CCLD	modules/hints/hints.so
CCLD modules/stats/stats.so
CCLD modules/cookies/cookies.so
scan-build: 22 bugs found.
scan-build: Run 'scan-view /builds/knot/knot-resolver/scan-results/2018-02-21-163607-13-1' to examine bug reports.
Uploading artifacts...
scan-results: found 27 matching files
Uploading artifacts to coordinator... ok id=111806 responseStatus=201 Created token=YH4VT6Jy
ERROR: Job failed: exit code 1