openvpn: Add OpenVPN 2.3.4 recipe from upstream OpenEmbedded

We should use a more recent version of the OpenVPN client. Import
it from the meta-networking layer like we did before. The sysvinit
script has just minor whitespace differences and wasn't imported.

We need to test opkg upgrades of OpenVPN through the VPN. We don't
want to kill the tunnel on such upgrade.

recipes-extra/openvpn/openvpn_2.3.4.bb

@@ -0,0 +1,37 @@
+SUMMARY = "A full-featured SSL VPN solution via tun device."
+HOMEPAGE = "http://openvpn.sourceforge.net"
+SECTION = "console/network"
+LICENSE = "GPLv2"
+LIC_FILES_CHKSUM = "file://COPYING;md5=5aac200199fde47501876cba7263cb0c"
+DEPENDS = "lzo openssl iproute2 ${@base_contains('DISTRO_FEATURES', 'pam', 'libpam', '', d)}"
+
+inherit autotools
+
+SRC_URI = "http://swupdate.openvpn.org/community/releases/openvpn-${PV}.tar.gz \
+           file://openvpn"
+
+SRC_URI[md5sum] = "04d47237907faabe9d046970ffe44b2e"
+SRC_URI[sha256sum] = "af506d5f48568fa8d2f2435cb3fad35f9a9a8f263999ea6df3ba296960cec85a"
+
+CFLAGS += "-fno-inline"
+
+# I want openvpn to be able to read password from file (hrw)
+EXTRA_OECONF += "--enable-password-save --enable-iproute2"
+EXTRA_OECONF += "${@base_contains('DISTRO_FEATURES', 'pam', '', '--disable-plugin-auth-pam', d)}"
+
+# Explicitly specify IPROUTE to bypass the configure-time check for /sbin/ip on the host.
+EXTRA_OECONF += "IPROUTE=/sbin/ip"
+
+do_install_append() {
+    install -d ${D}/${sysconfdir}/init.d
+    install -d ${D}/${sysconfdir}/openvpn
+    install -m 755 ${WORKDIR}/openvpn ${D}/${sysconfdir}/init.d
+}
+
+RRECOMMENDS_${PN} = "kernel-module-tun"
+
+FILES_${PN}-dbg += "${libdir}/openvpn/plugins/.debug"
+
+
+# We need to test opkg upgrade of OpenVPN through the OpenVPN first
+DEFAULT_PREFERENCE = "-1"