A preference sounds helpful and fails silently. When the wished-for number is
taken the plugin is handed a different one, the install succeeds, and whatever
was configured against the old number goes on pointing at nothing - with nobody
told. This afternoon that nearly happened: 3011 was only free because fofos-dev
had been stopped twenty minutes earlier, and had it still been running the site
would have been given a random port behind an nginx host still aimed at 3011.
So the number is always drawn fresh and always kept. Always drawn means it is
never something you can assume; always kept means the proxy host is configured
against it exactly once. The failure mode that remains - having to go and read
the number - is one that announces itself, which the other one did not.
isFree went with it; it existed only to test a wish.
pastilhas
d9110c373d