message: backend-common: use localhost to fall back to IPv4 if IPv6 isn't available
diff: @@ -49,7 +49,10 @@ export class SingleHostDiscovery implements PluginEndpointDiscovery {
  // Translate bind-all to localhost, and support IPv6
  let host = listenHost;
  if (host === '::') {
  - host = '::1';
  + // We use localhost instead of ::1, since IPv6-compatible systems should default
  + // to using IPv6 when they see localhost, but if the system doesn't support IPv6
  + // things will still work.
  + host = 'localhost';
  } else if (host === '0.0.0.0') {
  host = '127.0.0.1';
  }
  