openvpn: enable DCO by default

Enable the DCO option by default in the openvpn package to allow for
better performance and have a use case for kmod-ovpn-dco-v2 :-)

Fixes: https://github.com/openwrt/packages/issues/30070

And essentially reverts commit 135d391b8a

Signed-off-by: Dennis Camera <dennis.camera+openwrt@riiengineering.ch>
(cherry picked from commit 11e17a3ed6)

net/openvpn/Config-mbedtls.in

@@ -35,7 +35,7 @@ config OPENVPN_mbedtls_ENABLE_IPROUTE2
 config OPENVPN_mbedtls_ENABLE_DCO
 	depends on !OPENVPN_mbedtls_ENABLE_IPROUTE2
 	bool "Enable support for data channel offload"
-	default n
+	default y if !OPENVPN_mbedtls_ENABLE_IPROUTE2
 	help
 	  enable data channel offload support
 	  using the ovpn-dco-v2 kernel module

net/openvpn/Config-openssl.in

@@ -39,7 +39,7 @@ config OPENVPN_openssl_ENABLE_IPROUTE2
 config OPENVPN_openssl_ENABLE_DCO
 	depends on !OPENVPN_openssl_ENABLE_IPROUTE2
 	bool "Enable support for data channel offload"
-	default n
+	default y if !OPENVPN_openssl_ENABLE_IPROUTE2
 	help
 	  enable data channel offload support
 	  using the ovpn-dco-v2 kernel module

net/openvpn/Config-wolfssl.in

@@ -44,7 +44,7 @@ config OPENVPN_wolfssl_ENABLE_IPROUTE2
 config OPENVPN_wolfssl_ENABLE_DCO
 	depends on !OPENVPN_wolfssl_ENABLE_IPROUTE2
 	bool "Enable support for data channel offload"
-	default n
+	default y if !OPENVPN_wolfssl_ENABLE_IPROUTE2
 	select WOLFSSL_HAS_OPENVPN
 	help
 	  enable data channel offload support

net/openvpn/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=openvpn
 
 PKG_VERSION:=2.7.4
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_URL:=\
 	https://build.openvpn.net/downloads/releases/ \