Merge branch '252-9-9-sigs_test-updatesigs-is-failing' into 'master'

Skip lib/dns/tests/sigs_test for builds without DNSSEC support

Closes #252

See merge request !271
10 jobs for 251-documentation-of-rpz-min-update-interval-is-inconsistent-with-implementation in 8 minutes and 12 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Precheck
passed #11878
amd64 docker linux
precheck:debian:sid:amd64

00:00:11

 
  Build
passed #11879
amd64 docker linux
build:clang:debian:sid:amd64

00:02:59

passed #11881
i386 docker linux
build:clang:debian:sid:i386

00:03:15

passed #11880
amd64 docker linux
build:debian:sid:amd64

00:01:47

passed #11882
i386 docker linux
build:debian:sid:i386

00:01:50

 
  Test
passed #11886
amd64 docker linux
systemtest:debian:sid:amd64

00:04:44

passed #11887
i386 docker linux
systemtest:debian:sid:i386

00:04:44

passed #11884
amd64 docker linux
unittest:clang:debian:sid:amd64

00:00:45

passed #11883
amd64 docker linux
unittest:debian:sid:amd64

00:00:50

passed #11885
i386 docker linux
unittest:debian:sid:i386

00:00:51