Move headers from server/include to include/maxscale

- Headers now to be included as <maxscale/xyz.h>
- First step, no cleanup of headers has been made. Only moving
  from one place to another + necessary modifications.

include/maxscale/memlog.h

@@ -0,0 +1,62 @@
+#ifndef _MEMLOG_H
+#define _MEMLOG_H
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl.
+ *
+ * Change Date: 2019-07-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+/**
+ * @file memlog.h The memory logging mechanism
+ *
+ * @verbatim
+ * Revision History
+ *
+ * Date         Who             Description
+ * 26/09/14     Mark Riddoch    Initial implementation
+ *
+ * @endverbatim
+ */
+#include <maxscale/spinlock.h>
+
+typedef enum { ML_INT, ML_LONG, ML_LONGLONG, ML_STRING } MEMLOGTYPE;
+
+typedef struct memlog
+{
+    char            *name;
+    SPINLOCK        lock;
+    void            *values;
+    int             offset;
+    int             size;
+    MEMLOGTYPE      type;
+    unsigned int    flags;
+    unsigned int    iflags;
+    struct memlog   *next;
+} MEMLOG;
+
+/*
+ * MEMLOG flag bits
+ */
+#define MLNOAUTOFLUSH           0x0001
+
+/*
+ * MEMLOG internal flags
+ */
+#define MLWRAPPED               0x0001
+
+
+extern MEMLOG *memlog_create(char *, MEMLOGTYPE, int);
+extern void    memlog_destroy(MEMLOG *);
+extern void    memlog_set(MEMLOG *, unsigned int);
+extern void    memlog_log(MEMLOG *, void *);
+extern void    memlog_flush_all();
+extern void    memlog_flush(MEMLOG *);
+
+#endif