Clean up th ecompile process by centralizing the include files

- code compile tested, but due to a yet unresolved problem with
          parse.h's creation, compile not completed...

src/include/lib/hasht.h

@@ -0,0 +1,23 @@
+/*-------------------------------------------------------------------------
+ *
+ * hasht.h--
+ *    hash table related functions that are not directly supported
+ *    under utils/hash.
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: hasht.h,v 1.1 1996/08/28 07:22:38 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef	HASHT_H
+#define HASHT_H
+
+#include "utils/hsearch.h"
+
+typedef void (*HashtFunc)();
+
+extern void HashTableWalk(HTAB *hashtable, HashtFunc function, int arg);
+
+#endif	/* HASHT_H */