+update_dnscontrol: sshfp gdns
+ dnscontrol --diff2 push
+
+update_dnscontrol_primary: sshfp gdns
+ dnscontrol --diff2 push --domains openstreetmap.org
+
+update_geodns: gdns
+ parallel --will-cite rsync --quiet --recursive --checksum gdns/ {}::geodns ::: ${GEODNS_SERVERS}