package/openvpn: security bump version to 2.5.6

Switched _SITE to https and _SOURCE to .gz because upstream does not
provide a .xz tarball anymore.

Fixes CVE 2022-0547, changelog:
https://github.com/OpenVPN/openvpn/blob/release/2.5/Changes.rst

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/openvpn/openvpn.hash

@@ -1,3 +1,3 @@
 # Locally calculated after checking signature
-sha256  119bd69fa0210838f6cdaa273696dc738efa200f454dbe11eb6dfb75dfb6003b  openvpn-2.5.5.tar.xz
+sha256  333a7ef3d5b317968aca2c77bdc29aa7c6d6bb3316eb3f79743b59c53242ad3d  openvpn-2.5.6.tar.gz
 sha256  1fcb78d7e478bb8a9408010bdc91b36e213b1facfad093df3f7ce7e28af19043  COPYRIGHT.GPL

package/openvpn/openvpn.mk

@@ -4,9 +4,8 @@
 #
 ################################################################################
 
-OPENVPN_VERSION = 2.5.5
-OPENVPN_SOURCE = openvpn-$(OPENVPN_VERSION).tar.xz
-OPENVPN_SITE = http://swupdate.openvpn.net/community/releases
+OPENVPN_VERSION = 2.5.6
+OPENVPN_SITE = https://swupdate.openvpn.net/community/releases
 OPENVPN_DEPENDENCIES = host-pkgconf
 OPENVPN_LICENSE = GPL-2.0
 OPENVPN_LICENSE_FILES = COPYRIGHT.GPL