db_mysql: do not set reconnect field explicitely for newer mysql versions

- exposed with MariaDB 10.2
- include mysql.h instead of mysql_version.h
- reported by GH #1296

src/modules/db_mysql/km_my_con.c

@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2001-2004 iptel.org
  * Copyright (C) 2008 1&1 Internet AG
  *
@@ -14,8 +14,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License 
- * along with this program; if not, write to the Free Software 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
@@ -28,7 +28,7 @@
 
 #include "km_my_con.h"
 #include "km_db_mysql.h"
-#include <mysql_version.h>
+#include <mysql.h>
 #include "../../core/mem/mem.h"
 #include "../../core/dprint.h"
 #include "../../core/ut.h"
@@ -108,12 +108,17 @@ struct my_con* db_mysql_new_connection(const struct db_id* id)
 		rec = 1;
 		mysql_options(ptr->con, MYSQL_OPT_RECONNECT, &rec);
 	}
+#else
+	if (db_mysql_auto_reconnect)
+		ptr->con->reconnect = 1;
+	else
+		ptr->con->reconnect = 0;
 #endif
 
-	if (db_mysql_update_affected_found) { 
+	if (db_mysql_update_affected_found) {
 	    connection_flag |= CLIENT_FOUND_ROWS;
 	}
-	
+
 #if (MYSQL_VERSION_ID >= 40100)
 	if (!mysql_real_connect(ptr->con, host, id->username, id->password,
 				id->database, id->port, 0, connection_flag|CLIENT_MULTI_STATEMENTS)) {
@@ -127,11 +132,6 @@ struct my_con* db_mysql_new_connection(const struct db_id* id)
 		mysql_close(ptr->con);
 		goto err;
 	}
-	/* force reconnection if enabled */
-	if (db_mysql_auto_reconnect)
-		ptr->con->reconnect = 1;
-	else 
-		ptr->con->reconnect = 0;
 
 	LM_DBG("connection type is %s\n", mysql_get_host_info(ptr->con));
 	LM_DBG("protocol version is %d\n", mysql_get_proto_info(ptr->con));