Support for Unix sockets

[rockwotj]

We run in an environment where there are restrictions on using the network for tests. Most jdbc drivers have support for Unix sockets and postgres has options to only listen on Unix sockets. Can there be an option to only listen over Unix sockets?

[tomix26]

An interesting idea. This option could probably be added sometime in the future, but at this moment there are a lot of other tasks with higher priority. However, help is welcome.