Nix Store URL Format: Daemon/Unix Socket

1st chunk of `src/libstore/uds-remote-store.md`

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**Store URL format**: `daemon`, `unix://`*path*

This store type accesses a Nix store by talking to a Nix daemon
listening on the Unix domain socket *path*. The store pseudo-URL
`daemon` is equivalent to `unix:///nix/var/nix/daemon-socket/socket`.

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Title: Nix Store URL Format: Daemon/Unix Socket

Summary

This document describes two URL formats for accessing a Nix store: `daemon` and `unix://path`. Both formats enable communication with a Nix daemon listening on a Unix domain socket. The `daemon` pseudo-URL is a shorthand equivalent to `unix:///nix/var/nix/daemon-socket/socket`.