Back-patch to 8.4 (all supported versions).
<para>
This parameter can only be set at server start.
</para>
+
+ <para>
+ This parameter is irrelevant on systems, notably Solaris as of Solaris
+ 10, that ignore socket permissions entirely. There, one can achieve a
+ similar effect by pointing <varname>unix_socket_directories</> to a
+ directory having search permission limited to the desired audience.
+ This parameter is also irrelevant on Windows, which does not have
+ Unix-domain sockets.
+ </para>
</listitem>
</varlistentry>