Adjust man page for new functionality

Signed-off-by: Tony Zelenoff <antonz@parallels.com>
diff --git a/man/man8/ip-neighbour.8 b/man/man8/ip-neighbour.8
index cce7630..34980c5 100644
--- a/man/man8/ip-neighbour.8
+++ b/man/man8/ip-neighbour.8
@@ -24,7 +24,7 @@
 .IR DEV " ]"
 
 .ti -8
-.BR "ip neigh" " { " show " | " flush " } [ " to
+.BR "ip neigh" " { " show " | " flush " } [ " proxy " ] [ " to
 .IR PREFIX " ] [ "
 .B  dev
 .IR DEV " ] [ "
@@ -133,6 +133,10 @@
 only list the neighbours attached to this device.
 
 .TP
+.BI proxy
+list neighbour proxies.
+
+.TP
 .B unused
 only list neighbours which are not currently in use.