package/openvpn: security bump version to 2.6.7

Fixes CVE-2023-46849 & CVE-2023-46850.

Changelog:
https://github.com/OpenVPN/openvpn/blob/release/2.6/ChangeLog
https://github.com/OpenVPN/openvpn/blob/release/2.6/Changes.rst

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 437352bd5bd7ce9822f8c416b591bdbaf74dc751)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/openvpn/openvpn.hash

@@ -1,3 +1,3 @@
 # Locally calculated after checking signature
-sha256  3b074f392818b31aa529b84f76e8b5e4ad03fca764924f46d906bceaaf421034  openvpn-2.6.6.tar.gz
+sha256  ee9877340b1d8de47eb5b52712c3366855fa6a4a1955bf950c68577bd2039913  openvpn-2.6.7.tar.gz
 sha256  1fcb78d7e478bb8a9408010bdc91b36e213b1facfad093df3f7ce7e28af19043  COPYRIGHT.GPL

package/openvpn/openvpn.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-OPENVPN_VERSION = 2.6.6
+OPENVPN_VERSION = 2.6.7
 OPENVPN_SITE = https://swupdate.openvpn.net/community/releases
 OPENVPN_DEPENDENCIES = host-pkgconf libcap-ng
 OPENVPN_LICENSE = GPL-2.0