Listen on port 81, enable proxy in socket-deploy.
MBH-298, Force correct server hostname/port on rewrites.
MBH-298, when rewriting urls, use the scheme sent by the load balancer instead of our local scheme.
MBH-298, move $lb_scheme stuff up in the configuration so that it's used by the www.musicbrainz.org redirect as well.
Merge branch 'pino-beta' into beta

* pino-beta:
  MBH-298, move $lb_scheme stuff up in the configuration so that it's used by the www.musicbrainz.org redirect as well.
  MBH-298, when rewriting urls, use the scheme sent by the load balancer instead of our local scheme.
  MBH-298, Force correct server hostname/port on rewrites.
  Listen on port 81, enable proxy in socket-deploy.