sysmocom-openvpn-config: Add a recipe with our generic OpenVPN client config

This way I just need to install sysmocom-openvpn-config and copy
a matching key to the device for the VPN config. The configuration
file is marked as a CONFFILE, this means that modifications to it
will not be lost during upgrade.

recipes-config/sysmocom-openvpn-config/sysmocom-openvpn-config/sysmocom-vpn.conf

@@ -0,0 +1,11 @@
+#OpenVPN client conf
+tls-client
+client
+dev tun
+proto udp
+tun-mtu 1500
+remote admin.sysmocom.de
+remote 78.46.147.238
+comp-lzo
+pkcs12 sysmocom-client-cert.p12
+cipher BF-CBC

recipes-config/sysmocom-openvpn-config/sysmocom-openvpn-config_1.bb

@@ -0,0 +1,16 @@
+HOMEPAGE = "http://www.sysmocom.de"
+RDEPENDS_${PN} = "openvpn"
+
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58"
+
+SRC_URI = "file://sysmocom-vpn.conf"
+PR = "r3"
+
+CONFFILES_${PN} = "${sysconfdir}/openvpn/sysmocom-vpn.conf"
+PACKAGE_ARCH = "all"
+
+do_install() {
+	install -d ${D}${sysconfdir}/openvpn
+	install -m 0644 ${WORKDIR}/sysmocom-vpn.conf ${D}${sysconfdir}/openvpn
+}