add backup jail to DNS
add backup jail to DNS

buildbot/buildbot-infra,buildbot/buildbot-infra,djmitche/buildbot-infra,djmitche/buildbot-infra,buildbot/buildbot-infra,seankelly/buildbot-infra,seankelly/buildbot-infra,seankelly/buildbot-infra,ewongbb/buildbot-infra,ewongbb/buildbot-infra,djmitche/buildbot-infra