Break out more header info into separate files. Use appropriate header files

throughout.
* shared.h: Remove.
* cygwin_version.h: New file.
* delqueue.h: New file.
* environ.h: New file.
* host_dependent.h: New file.
* perprocess.h: New file.
* registry.h: New file.
* security.h: New file.

winsup/cygwin/delqueue.h

@@ -0,0 +1,30 @@
+/* delqueue.h: shared info for cygwin
+
+   Copyright 2000 Cygnus Solutions.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+/* First pass at a file deletion queue structure.
+
+   We can't keep this list in the per-process info, since
+   one process may open a file, and outlive a process which
+   wanted to unlink the file - and the data would go away.
+*/
+
+#define MAX_DELQUEUES_PENDING 100
+
+class delqueue_list
+{
+  char name[MAX_DELQUEUES_PENDING][MAX_PATH];
+  char inuse[MAX_DELQUEUES_PENDING];
+  int empty;
+
+public:
+  void init ();
+  void queue_file (const char *dosname);
+  void process_queue ();
+};