openvpn: security bump to version 2.3.11

Fixed port-share bug with DoS potential.
Fix buffer overflow by user supplied data.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/openvpn/openvpn.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking pgp signature
-sha256	52f16bef3a02369682f1464fbd2821070c98d0bd993f4c46c764e87375abdcc1 	openvpn-2.3.9.tar.xz
+sha256	0f5f1ca1dc5743fa166d93dd4ec952f014b5f33bafd88f0ea34b455cae1434a7 	openvpn-2.3.11.tar.xz

package/openvpn/openvpn.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-OPENVPN_VERSION = 2.3.9
+OPENVPN_VERSION = 2.3.11
 OPENVPN_SOURCE = openvpn-$(OPENVPN_VERSION).tar.xz
 OPENVPN_SITE = http://swupdate.openvpn.net/community/releases
 OPENVPN_DEPENDENCIES = host-pkgconf openssl