minor: docs

diff --git a/vpn-server-setup b/vpn-server-setup
index 5c6f195edb57c195c94de4523d9f12acc948b03d..69ce5416c47fec3c13dad237930962fd1cfdddaa 100755 (executable)
--- a/vpn-server-setup
+++ b/vpn-server-setup
@@ -33,6 +33,8 @@ usage: ${0##*/} [OPTIONS] [IPV6_ADDR/BITS]
 -s   Do not start openvpn
 -h --help print help
 
+IPV6_ADDR/BITS    Ipv6 address of the vpn interface.
+
 Sets up a vpn server which pushes gateway route and dns server so all
 traffic goes through the vpn. requires systemd, and might have some
 debian specific paths.