Make TLSv1 use TLSv1.0 specifically to prevent ambiguity with TLSv1.1, TLSv1.2, TLSv1.3

src/httperf.c

@@ -1052,13 +1052,16 @@ main(int argc, char **argv)
                     ssl_ctx = SSL_CTX_new (SSLv3_client_method ()); break;
 #endif
 #endif
-                    /* 4/TLSv1 */
+                    /* 4/TLSv1.0 */
                     case 4: 
 #if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
                     ssl_ctx = SSL_CTX_new (TLS_client_method ()); 
-                    SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3); break;
+                    SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_VERSION);
+		    SSL_CTX_set_max_proto_version(ssl_ctx, TLS1_VERSION);
+		    break;
 #else
                     ssl_ctx = SSL_CTX_new (TLSv1_client_method ()); break;
+		    SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1_2); break;
 #endif
 
                 }