dns: use zonetool dnssec capabilities
Zones marked with 'DNSSEC' attribute in zonetool will get their records signed with DNSSEC. If the signing key cannot be found it'll be generated by zonetool.
See also ai3/testbed#160
Zones marked with 'DNSSEC' attribute in zonetool will get their records signed with DNSSEC. If the signing key cannot be found it'll be generated by zonetool.
See also ai3/testbed#160