MXS-1398: Clean up mysql.h header

Cleaned up the MaxScale version of the mysql.h header by removing all
unused includes. This revealed a large amount of dependencies on these
removed includes in other files which needed to be fixed.

Also sorted all includes in changed files by type and alphabetical
order. Removed explicit revision history from modified files.

server/core/modutil.cc

@@ -13,27 +13,18 @@
 
 /**
  * @file modutil.c  - Implementation of useful routines for modules
- *
- * @verbatim
- * Revision History
- *
- * Date         Who                     Description
- * 04/06/14     Mark Riddoch            Initial implementation
- * 24/10/14     Massimiliano Pinto      Added modutil_send_mysql_err_packet, modutil_create_mysql_err_msg
- * 04/01/16     Martin Brampton         Streamline code in modutil_get_complete_packets
- *
- * @endverbatim
  */
 
 #include <string.h>
 #include <strings.h>
 
-#include <maxscale/buffer.h>
-#include <maxscale/protocol/mysql.h>
 #include <maxscale/alloc.h>
-#include <maxscale/poll.h>
+#include <maxscale/buffer.h>
 #include <maxscale/modutil.h>
 #include <maxscale/platform.h>
+#include <maxscale/poll.h>
+#include <maxscale/protocol/mysql.h>
+#include <maxscale/utils.h>
 
 /** These are used when converting MySQL wildcards to regular expressions */
 static SPINLOCK re_lock = SPINLOCK_INIT;