add mongo auth support, and copy a md5 lib to 3rd

3rd/lua-md5/md5.h

@@ -0,0 +1,20 @@
+/**
+*  $Id: md5.h,v 1.2 2006/03/03 15:04:49 tomas Exp $
+*  Cryptographic module for Lua.
+*  @author  Roberto Ierusalimschy
+*/
+
+
+#ifndef md5_h
+#define md5_h
+
+#include <lua.h>
+
+
+#define HASHSIZE       16
+
+void md5 (const char *message, long len, char *output);
+int luaopen_md5_core (lua_State *L);
+
+
+#endif