Redirect some historical Gitter subdomains to the main Gitter homepage
Follow-up to https://github.com/matrix-org/matrix-ansible-private/issues/6466,
These subdomains should redirect to the main Gitter homepage.
irc.gitter.im
billing.gitter.im
developer.gitter.im
support.gitter.im
next.gitter.im
sidecar.gitter.im
login.gitter.im
Edited by Eric Eastwood