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>

zdev/include/export.h

@@ -0,0 +1,38 @@
+/*
+ * zdev - Modify and display the persistent configuration of devices
+ *
+ * Copyright IBM Corp. 2016, 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.
+ */
+
+#ifndef EXPORT_H
+#define EXPORT_H
+
+#include <stdio.h>
+
+#include "exit_code.h"
+#include "misc.h"
+
+struct device;
+struct devtype;
+
+typedef enum {
+	export_device,
+	export_devtype,
+} export_t;
+
+struct export_object {
+	export_t type;
+	union {
+		struct devtype *dt;
+		struct device *dev;
+	} ptr;
+};
+
+exit_code_t export_write_device(FILE *, struct device *, config_t, int *);
+exit_code_t export_write_devtype(FILE *, struct devtype *, config_t, int *);
+exit_code_t export_read(FILE *, const char *, struct util_list *);
+
+#endif /* EXPORT_H */