virsh: Display vhostuser socket path in domiflist

https://bugzilla.redhat.com/show_bug.cgi?id=1630164

The domiflist command is designed to show a brief information on
domain interfaces. One piece of information that is shows is
"Source" - source network, device, name, bridge. However, it's
ignoring vhostuser for which we can show the unix socket it's
associated with.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>

tools/virsh-domain-monitor.c

@@ -715,7 +715,8 @@ cmdDomiflist(vshControl *ctl, const vshCmd *cmd)
         source = virXPathString("string(./source/@bridge"
                                 "|./source/@dev"
                                 "|./source/@network"
-                                "|./source/@name)", ctxt);
+                                "|./source/@name"
+                                "|./source/@path)", ctxt);
 
         target = virXPathString("string(./target/@dev)", ctxt);
         model = virXPathString("string(./model/@type)", ctxt);