curl: Remove PolarSSL and adjust default to mbedTLS

luci-ssl has already made the switch since mainline support for PolarSSL is
almost over (2016).

Signed-off-by: Rosen Penev <rosenp@gmail.com>

package/network/utils/curl/Config.in

@@ -4,10 +4,7 @@ comment "SSL support"
 
 choice
 	prompt "Selected SSL library"
-	default LIBCURL_POLARSSL
-
-	config LIBCURL_POLARSSL
-		bool "PolarSSL"
+	default LIBCURL_MBEDTLS
 
 	config LIBCURL_MBEDTLS
 		bool "mbed TLS"

package/network/utils/curl/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=curl
 PKG_VERSION:=7.52.1
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=http://curl.haxx.se/download/ \
@@ -32,7 +32,6 @@ PKG_CONFIG_DEPENDS:= \
   CONFIG_LIBCURL_CYASSL \
   CONFIG_LIBCURL_GNUTLS \
   CONFIG_LIBCURL_OPENSSL \
-  CONFIG_LIBCURL_POLARSSL \
   CONFIG_LIBCURL_MBEDTLS \
   CONFIG_LIBCURL_NOSSL \
   \
@@ -87,7 +86,7 @@ define Package/libcurl
   $(call Package/curl/Default)
   SECTION:=libs
   CATEGORY:=Libraries
-  DEPENDS:=+LIBCURL_POLARSSL:libpolarssl +LIBCURL_CYASSL:libcyassl +LIBCURL_OPENSSL:libopenssl +LIBCURL_GNUTLS:libgnutls +LIBCURL_MBEDTLS:libmbedtls
+  DEPENDS:= +LIBCURL_CYASSL:libcyassl +LIBCURL_OPENSSL:libopenssl +LIBCURL_GNUTLS:libgnutls +LIBCURL_MBEDTLS:libmbedtls
   DEPENDS += +LIBCURL_ZLIB:zlib +LIBCURL_THREADED_RESOLVER:libpthread +LIBCURL_LDAP:libopenldap +LIBCURL_LIBIDN:libidn +LIBCURL_SSH2:libssh2
   TITLE:=A client-side URL transfer library
   MENU:=1
@@ -117,7 +116,6 @@ CONFIGURE_ARGS += \
 	$(if $(CONFIG_LIBCURL_CYASSL),--with-cyassl="$(STAGING_DIR)/usr" --without-ca-path --with-ca-bundle=/etc/ssl/certs/ca-certificates.crt,--without-cyassl) \
 	$(if $(CONFIG_LIBCURL_GNUTLS),--with-gnutls="$(STAGING_DIR)/usr" --without-ca-bundle --with-ca-path=/etc/ssl/certs,--without-gnutls) \
 	$(if $(CONFIG_LIBCURL_OPENSSL),--with-ssl="$(STAGING_DIR)/usr" --without-ca-bundle --with-ca-path=/etc/ssl/certs,--without-ssl) \
-	$(if $(CONFIG_LIBCURL_POLARSSL),--with-polarssl="$(STAGING_DIR)/usr" --without-ca-bundle --with-ca-path=/etc/ssl/certs,--without-polarssl) \
 	$(if $(CONFIG_LIBCURL_MBEDTLS),--with-mbedtls="$(STAGING_DIR)/usr" --without-ca-path --with-ca-bundle=/etc/ssl/certs/ca-certificates.crt,--without-mbedtls) \
 	\
 	$(if $(CONFIG_LIBCURL_LIBIDN),--with-libidn="$(STAGING_DIR)/usr",--without-libidn) \

package/network/utils/curl/patches/310-mbedtls-disable-runtime-version-check.patch

@@ -0,0 +1,11 @@
+--- a/lib/vtls/mbedtls.c
++++ b/lib/vtls/mbedtls.c
+@@ -724,7 +724,7 @@ void Curl_mbedtls_session_free(void *ptr
+ 
+ size_t Curl_mbedtls_version(char *buffer, size_t size)
+ {
+-  unsigned int version = mbedtls_version_get_number();
++  unsigned int version = MBEDTLS_VERSION_NUMBER;
+   return snprintf(buffer, size, "mbedTLS/%d.%d.%d", version>>24,
+                   (version>>16)&0xff, (version>>8)&0xff);
+ }

package/network/utils/curl/patches/310-polarssl-disable-runtime-version-check.patch

@@ -1,22 +0,0 @@
---- a/lib/vtls/polarssl.c
-+++ b/lib/vtls/polarssl.c
-@@ -657,7 +657,7 @@ void Curl_polarssl_session_free(void *pt
- 
- size_t Curl_polarssl_version(char *buffer, size_t size)
- {
--  unsigned int version = version_get_number();
-+  unsigned int version = POLARSSL_VERSION_NUMBER;
-   return snprintf(buffer, size, "%s/%d.%d.%d",
-                   version >= 0x01030A00?"mbedTLS":"PolarSSL",
-                   version>>24, (version>>16)&0xff, (version>>8)&0xff);
---- a/lib/vtls/mbedtls.c
-+++ b/lib/vtls/mbedtls.c
-@@ -724,7 +724,7 @@ void Curl_mbedtls_session_free(void *ptr
- 
- size_t Curl_mbedtls_version(char *buffer, size_t size)
- {
--  unsigned int version = mbedtls_version_get_number();
-+  unsigned int version = MBEDTLS_VERSION_NUMBER;
-   return snprintf(buffer, size, "mbedTLS/%d.%d.%d", version>>24,
-                   (version>>16)&0xff, (version>>8)&0xff);
- }