[network-manager-vpnc] appdata: fix appstream-util validate complaints

[Lubomir Rintel <lkundrak src gnome org>]

commit 5dedc99b1fba5640386f330745451c83c2ab6b18
Author: Lubomir Rintel <lkundrak v3 sk>
Date:   Thu Apr 14 12:36:28 2016 +0200

    appdata: fix appstream-util validate complaints

 appdata/network-manager-vpnc.appdata.xml.in |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/appdata/network-manager-vpnc.appdata.xml.in b/appdata/network-manager-vpnc.appdata.xml.in
index 4d954a9..3bffa8a 100644
--- a/appdata/network-manager-vpnc.appdata.xml.in
+++ b/appdata/network-manager-vpnc.appdata.xml.in
@@ -21,7 +21,8 @@
   </keywords>
 
   <description>
-    <_p>Support for configuring Cisco virtual private network connections based on VPNC.</_p>
+    <_p>Support for configuring virtual private networks based on VPNC.</_p>
+    <_p>Compatible with Cisco VPN concentrators configured to use IPsec.</_p>
   </description>
 
   <screenshots>