WebServer can't listen on 127.0.0.1

[nmingotti]

This problem was sent to the mailing list on 8-Aug-2021. It is here not to be forgotten.

[A] This works

wSer _ (WebServer reset default) listenOn: 3001.

[B] This doesn't work

wSer _ (WebServer reset default) listenOn: 3001 interface: #(127 0 0 1).

It is important to have [B] working because usually web servers are made to listen only locally
and the public access is managed by a specialized software as nginx.