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/utils.h

@@ -0,0 +1,40 @@
+#ifndef _UTILS_H
+#define _UTILS_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 utils.h Utility functions headers
+ *
+ * @verbatim
+ * Revision History
+ *
+ * Date     Who                 Description
+ * 22/03/16 Martin Brampton     Initial implementation
+ *
+ * @endverbatim
+ */
+
+int setnonblocking(int fd);
+char  *gw_strend(register const char *s);
+static char gw_randomchar();
+int gw_generate_random_str(char *output, int len);
+int gw_hex2bin(uint8_t *out, const char *in, unsigned int len);
+char *gw_bin2hex(char *out, const uint8_t *in, unsigned int len);
+void gw_str_xor(uint8_t *output, const uint8_t *input1, const uint8_t *input2, unsigned int len);
+void gw_sha1_str(const uint8_t *in, int in_len, uint8_t *out);
+void gw_sha1_2_str(const uint8_t *in, int in_len, const uint8_t *in2, int in2_len, uint8_t *out);
+int gw_getsockerrno(int fd);
+char *create_hex_sha1_sha1_passwd(char *passwd);
+
+#endif