[network-manager-vpnc] doc: update authors

[Lubomir Rintel <lkundrak src gnome org>]

commit fc4f34d837b52d9d11c2deab181b7aa7f7c4c7df
Author: Lubomir Rintel <lkundrak v3 sk>
Date:   Mon Aug 31 14:30:12 2015 +0200

    doc: update authors

 AUTHORS |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/AUTHORS b/AUTHORS
index a360736..2158c82 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1,3 +1,6 @@
 Dan Williams <dcbw redhat com>
 David Zeuthen <davidz redhat com>
-
+Michael Biebl <biebl debian org>
+Lubomir Rintel <lkundrak v3 sk>
+Dan Winship <danw gnome org>
+Jiří Klimeš <jklimes redhat com>