wolfssl: add support for OpenVPN

Support for wolfSSL has been upstreamed to the master OpenVPN branch
in f6dca235ae560597a0763f0c98fcc9130b80ccf4, so we can use wolfSSL
directly in OpenVPN. So no more needed differnt SSL engine for OpenVPN
in systems based on wolfSSL library
Compiled && tested on ramips/mt7620, ramips/mt7621

Signed-off-by: Ivan Pavlov <AuthorReflex@gmail.com>

package/libs/wolfssl/Config.in

@@ -51,6 +51,10 @@ config WOLFSSL_HAS_ECC25519
 	bool "Include ECC Curve 25519 support"
 	default n
 
+config WOLFSSL_HAS_OPENVPN
+	bool "Include OpenVPN support"
+	default n
+
 config WOLFSSL_HAS_DEVCRYPTO
 	bool
 

package/libs/wolfssl/Makefile

@@ -31,7 +31,8 @@ PKG_CONFIG_DEPENDS:=\
 	CONFIG_WOLFSSL_HAS_DH CONFIG_WOLFSSL_HAS_DTLS \
 	CONFIG_WOLFSSL_HAS_ECC25519 CONFIG_WOLFSSL_HAS_OCSP \
 	CONFIG_WOLFSSL_HAS_SESSION_TICKET CONFIG_WOLFSSL_HAS_TLSV10 \
-	CONFIG_WOLFSSL_HAS_TLSV13 CONFIG_WOLFSSL_HAS_WPAS CONFIG_WOLFSSL_HAS_CERTGEN
+	CONFIG_WOLFSSL_HAS_TLSV13 CONFIG_WOLFSSL_HAS_WPAS CONFIG_WOLFSSL_HAS_CERTGEN \
+	CONFIG_WOLFSSL_HAS_OPENVPN
 
 PKG_ABI_VERSION=$(patsubst %-stable,%,$(PKG_VERSION)).$(call version_abbrev,$(call confvar,$(PKG_CONFIG_DEPENDS)))
 
@@ -84,6 +85,7 @@ CONFIGURE_ARGS += \
 	--$(if $(CONFIG_WOLFSSL_HAS_DTLS),enable,disable)-dtls \
 	--$(if $(CONFIG_WOLFSSL_HAS_ECC25519),enable,disable)-curve25519 \
 	--$(if $(CONFIG_WOLFSSL_HAS_AFALG),enable,disable)-afalg \
+	--$(if $(CONFIG_WOLFSSL_HAS_OPENVPN),enable,disable)-openvpn \
 	--enable-devcrypto=$(if $(CONFIG_WOLFSSL_HAS_DEVCRYPTO_CBC),cbc\
 			  ,$(if $(CONFIG_WOLFSSL_HAS_DEVCRYPTO_AES),aes\
 			  ,$(if $(CONFIG_WOLFSSL_HAS_DEVCRYPTO_FULL),yes,no)))