move all the *.planet.wikimedia.org virtual hosts behind misc-web as a subtask of T60048
related gerrit changes:
varnish: https://gerrit.wikimedia.org/r/#/c/181419/ (regex lgtm)
DNS https://gerrit.wikimedia.org/r/#/c/181985/ (yep)
install *planet. wildcard SSL cert on misc-web https://gerrit.wikimedia.org/r/181415 (ok with Faidon per comments on parent ticket?)