(feat) Unix socket server support

[eirnym]

Does it fit the projects scope?

• This is relevant

Why?

TCP servers are nice when you have few of them on a host.

Unix sockets are faster I'm able to manage them easily in nginx, e.g. I can match hostname to unix socket file to have indefinite servers without touching nginx config.

Solution?

Go has well known support for listening Unix socket and it works quite well. Two options to add: unix_socket_pathname and unix_socket_mask.

Alternatives?

Docker translation between TCP and Unix sockets is quite slow thus not an option.

Extra Context

No response

[enchant97]

It seems possible to implement and I can see it may be useful to some people.