Initial s390-tools-2.0.0 import

This commit is based on the s390-tools-1.39.0 version.

Changes on top of s390-tools-1.39.0:

 - Add MIT license to all source files
 - Add LICENSE file
 - Transform REAMDE to README.md (markdown)
 - Add AUTHORS.md file
 - Add CONTRIBUTING.md file
 - Move changelog from README to CHANGELOG.md file

Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>

include/lib/u2s.h

@@ -0,0 +1,21 @@
+/*
+ *
+ * Copyright IBM Corp. 2004, 2017
+ *
+ * s390-tools is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See LICENSE for details.
+ *
+ * History of changes (starts July 2004)
+ * 2004-07-02 initial
+ */
+
+#ifndef LIB_U2S_H
+#define LIB_U2S_H
+
+#define U2S_BUS_ID_SIZE    32
+
+int u2s_getbusid(char *, char *);
+int u2s_read_attribute(char *, char *, char *, size_t);
+int u2s_get_host_access_count(char *);
+
+#endif /* LIB_U2S_H */