generate documentation from config.sample.php

admin_manual/configuration_server/config_sample_php_parameters.rst

@@ -336,7 +336,8 @@ Your host server name, for example ``localhost``, ``hostname``,
 ``hostname.example.com``, or the IP address.
 
 To specify a port use ``hostname:####``, for IPv6 addresses use the URI notation ``[ip]:port``.
-To specify a Unix socket use ``/path/to/directory/containing/socket``, e.g. ``/run/postgresql/``.
+To specify a Unix socket use ``localhost:/path/to/directory/containing/socket`` or
+``:/path/to/directory/containing/socket``, e.g. ``localhost:/run/postgresql/``.
 
 dbname
 ^^^^^^