Add entry.c to complete previous change

servers/slapd/back-ldbm/entry.c

+/* entry.c - ldbm backend entry_release routine */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/socket.h>
+#include <ac/string.h>
+
+#include "slap.h"
+#include "back-ldbm.h"
+#include "proto-back-ldbm.h"
+
+
+int
+ldbm_back_entry_release_rw(
+	Backend *be,
+	Entry   *e,
+	int     rw
+)
+{
+	struct ldbminfo	*li = (struct ldbminfo *) be->be_private;
+
+	/* free entry and reader or writer lock */
+	cache_return_entry_rw( &li->li_cache, e, rw ); 
+
+	return 0;
+}