util.xml: Deduplicate handlers for restricted XML
Makes the code more like util.xmppstream, allowing easier comparisons if
we ever need to apply fixes in the future.
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
-- COMPAT: Only for external pre-0.9 modules
local hashes = require "util.hashes"
return { md5 = hashes.hmac_md5,
sha1 = hashes.hmac_sha1,
sha256 = hashes.hmac_sha256 };