openvpn: update to 2.3.11

Security fixes:
* Fixed port-share bug with DoS potential
* Fix buffer overflow by user supplied data

Full changelog: https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn23#OpenVPN2.3.11

Signed-off-by: Magnus Kroken <mkroken@gmail.com>

package/network/services/openvpn/Makefile

@@ -9,12 +9,12 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=openvpn
 
-PKG_VERSION:=2.3.10
-PKG_RELEASE:=2
+PKG_VERSION:=2.3.11
+PKG_RELEASE:=1
 
 PKG_SOURCE_URL:=http://swupdate.openvpn.net/community/releases
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
-PKG_MD5SUM:=8831ded42db4317e287157b6b8cba74c
+PKG_MD5SUM:=0f5f1ca1dc5743fa166d93dd4ec952f014b5f33bafd88f0ea34b455cae1434a7
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
 

package/network/services/openvpn/patches/100-polarssl-disable-runtime-version-check.patch

@@ -1,6 +1,6 @@
 --- a/src/openvpn/ssl_polarssl.c
 +++ b/src/openvpn/ssl_polarssl.c
-@@ -1153,7 +1153,7 @@ const char *
+@@ -1151,7 +1151,7 @@ const char *
  get_ssl_library_version(void)
  {
      static char polar_version[30];

package/network/services/openvpn/patches/101-remove_polarssl_debug_call.patch

@@ -0,0 +1,21 @@
+openvpn: remove call to PolarSSL debug function
+
+OpenVPN >=2.3.11 uses PolarSSL debug functions for improved logging.
+This requires that PolarSSL is built with POLARSSL_DEBUG_C, which increases
+its size significantly.
+
+This change does not impact OpenVPN operation, see:
+https://sourceforge.net/p/openvpn/mailman/message/35153943/
+
+Signed-off-by: Magnus Kroken <mkroken@gmail.com>
+
+--- a/src/openvpn/ssl_polarssl.c
++++ b/src/openvpn/ssl_polarssl.c
+@@ -742,7 +742,7 @@ void key_state_ssl_init(struct key_state
+   if (polar_ok(ssl_init(ks_ssl->ctx)))
+     {
+       /* Initialise SSL context */
+-      debug_set_threshold(3);
++      /*debug_set_threshold(3);*/
+       ssl_set_dbg (ks_ssl->ctx, my_debug, NULL);
+       ssl_set_endpoint (ks_ssl->ctx, ssl_ctx->endpoint);