[master] 1323396 Clarify that VMOD unix applies to a listener address.

[Geoff Simmons]

commit 13233968041fe794a64c34205733eab72aabe0f0
Author: Geoff Simmons <geoff at uplex.de>
Date:   Tue Mar 13 13:17:00 2018 +0100

    Clarify that VMOD unix applies to a listener address.
    
    Currently not backends.

diff --git a/lib/libvmod_unix/vmod.vcc b/lib/libvmod_unix/vmod.vcc
index 55d7f67..8b72913 100644
--- a/lib/libvmod_unix/vmod.vcc
+++ b/lib/libvmod_unix/vmod.vcc
@@ -13,8 +13,9 @@ DESCRIPTION
 ===========
 
 This VMOD provides information about the credentials of the peer
-process (user and group of the process owner) that is connected to
-Varnish via a Unix domain socket, if the platform supports it.
+process (user and group of the process owner) that is connected to a
+Varnish listener via a Unix domain socket, if the platform supports
+it.
 
 Examples::