polarssl: Fix exclusive SSL protocol version options

Prior to this change the options for exclusive SSL protocol versions did
not actually set the protocol exclusive.

http://curl.haxx.se/mail/lib-2015-01/0002.html
Reported-by: Dan Fandrich

lib/vtls/polarssl.c

@@ -289,27 +289,36 @@ polarssl_connect_step1(struct connectdata *conn,
   switch(data->set.ssl.version) {
   default:
   case CURL_SSLVERSION_DEFAULT:
+  case CURL_SSLVERSION_TLSv1:
     ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
                         SSL_MINOR_VERSION_1);
     break;
   case CURL_SSLVERSION_SSLv3:
     ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
                         SSL_MINOR_VERSION_0);
+    ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
+                        SSL_MINOR_VERSION_0);
     infof(data, "PolarSSL: Forced min. SSL Version to be SSLv3\n");
     break;
   case CURL_SSLVERSION_TLSv1_0:
     ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
                         SSL_MINOR_VERSION_1);
+    ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
+                        SSL_MINOR_VERSION_1);
     infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.0\n");
     break;
   case CURL_SSLVERSION_TLSv1_1:
     ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
                         SSL_MINOR_VERSION_2);
+    ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
+                        SSL_MINOR_VERSION_2);
     infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.1\n");
     break;
   case CURL_SSLVERSION_TLSv1_2:
     ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
                         SSL_MINOR_VERSION_3);
+    ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
+                        SSL_MINOR_VERSION_3);
     infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.2\n");
     break;
   }