[MINOR] merge ebtree version 3.0

Version 3.0 of ebtree has been merged in but is not used yet.
diff --git a/src/ebtree.c b/src/ebtree.c
new file mode 100644
index 0000000..a80a86f
--- /dev/null
+++ b/src/ebtree.c
@@ -0,0 +1,31 @@
+/*
+ * Elastic Binary Trees - exported generic functions
+ * (C) 2002-2007 - Willy Tarreau <w@1wt.eu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <common/ebtree.h>
+
+void eb_delete(struct eb_node *node)
+{
+	__eb_delete(node);
+}
+
+/* used by insertion primitives */
+REGPRM1 struct eb_node *eb_insert_dup(struct eb_node *sub, struct eb_node *new)
+{
+	return __eb_insert_dup(sub, new);
+}