Code review comment for lp://staging/~julian-edwards/maas/releasenotes-1.6

> Might be worth mentioning that the cluster<->region communications now
> requires arbitrary high-numbered port connections. See
> https://bugs.launchpad.net/maas/+bug/1352923 for details.

What I meant is that, when we fix this, we will still require a range of ports to be open for cluster<->region communication (I assume we will fix the bug linked above this way); this should probably be mentioned in the release notes.