Add <ac/stdlib.h> to genericize memory allocators.

Remove memory.h/malloc.h inclusion from <ac/string.h>.
Need to s/<stdlib.h>/<ac/stdlib.h> everywhere.

include/ac/stdlib.h

+/* Generic stdlib.h */
+/*
+ * Copyright 1998,1999 The OpenLDAP Foundation, Redwood City, California, USA
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted only
+ * as authorized by the OpenLDAP Public License.  A copy of this
+ * license is available at http://www.OpenLDAP.org/license.html or
+ * in file LICENSE in the top-level directory of the distribution.
+ */
+
+#ifndef _AC_STDLIB_H
+#define _AC_STDLIB_H
+
+#ifdef STDC_HEADERS
+#	include <stdlib.h>
+
+#else
+
+#	ifdef HAVE_MEMORY_H
+#		include <memory.h>
+#	endif
+
+#	ifdef HAVE_MALLOC_H
+#		include <malloc.h>
+#	endif
+
+#endif
+
+#endif /* _AC_STDLIB_H */

include/ac/string.h

@@ -24,11 +24,6 @@
 
 #	ifdef HAVE_MEMORY_H
 #		include <memory.h>
-#	endif
-
-	/* we should actually create <ac/stdlib.h> */
-#	ifdef HAVE_MALLOC_H
-#		include <malloc.h>
 #	endif
 
 #	ifndef HAVE_STRRCHR
@@ -77,5 +72,4 @@ extern int (strncasecmp)();
 #	endif
 #endif
 
-
 #endif /* _AC_STRING_H */