doc daemon: note the --listen directive is not always required

Users of socket activation don't need it, and hopefully other
init systems support it, too.

diff --git a/Documentation/public-inbox-daemon.pod b/Documentation/public-inbox-daemon.pod
index 857668832699f5e634e1abfddfdb09c0f170da26..abb84dd7ebaba196d4e1e6b671bf6204748f705f 100644 (file)
--- a/Documentation/public-inbox-daemon.pod
+++ b/Documentation/public-inbox-daemon.pod
@@ -42,6 +42,9 @@ like L<nginx(8)> to use.
 May be specified multiple times to allow listening on multiple
 sockets.
 
+This does not need to be specified at all if relying on
+L<systemd.socket(5)> or similar
+
 Default: server-dependent unless socket activation is used with
 L<systemd(1)> or similar (see L<systemd.socket(5)>).