🐛 Expose the socket address clients can use

Until now, `--print-address` would print the address specification,
that is, the input used to determine how and where the server would
listen. This would be useful for clients for `unix:path=...`, but for
`unix:dir=...` and `unix:tmpdir=...` this would not work. So now we
share the socket address that we produce from the address
specification.

src/bus/mod.rs

@@ -65,8 +65,14 @@ impl Bus {
             Transport::Unix(unix) => {
                 // Resolve address specification into address that clients can use.
                 let addr = Self::unix_addr(unix)?;
-
-                (Self::unix_stream(addr).await?, AuthMechanism::External)
+                address = Address::try_from(
+                    format!("unix:path={}", addr.as_pathname().unwrap().display()).as_str(),
+                )?;
+
+                (
+                    Self::unix_stream(addr.clone()).await?,
+                    AuthMechanism::External,
+                )
             }
             Transport::Tcp(tcp) => {
                 #[cfg(not(windows))]