Draft: Configure with --enable-dnstap by default
All platforms but OpenBSD have
protobuf-c in their repositories and
DNSTAP can be tested there. The DNSTAP testing reach can be broadened by making the
--enable-dnstap option the default and disabling DNSTAP where necessary or suitable. For the sake of testing in Linux
environments where DNSTAP dependencies are not present,
was added to Ubuntu Xenial job.
protobuf-c need to be added to few CI images. images!101 needs to be merged first.