Support tool broken for dispatcher stats

I think this is because the syntax of the command has changed from a recent Dustin fix:

==============================================================================
memcached stats dispatcher
stats -a 127.0.0.1:11210 dispatcher _admin _admin
==============================================================================
Traceback (most recent call last):
File "/opt/membase/bin/ns_server/../ep_engine/management/stats", line 191, in ?
main()
File "/opt/membase/bin/ns_server/../ep_engine/management/stats", line 188, in main
c.execute()
File "/opt/membase/1.6.2/bin/ep_engine/management/clitool.py", line 42, in execute
f[0](mc, *args[2:], **opts._dict_)
File "/opt/membase/bin/ns_server/../ep_engine/management/stats", line 23, in g
mc.sasl_auth_plain(username, password)
File "/opt/membase/1.6.2/bin/ep_engine/management/mc_bin_client.py", line 164, in sasl_auth_plain
return self.sasl_auth_start('PLAIN', '\0'.join([foruser, user, password]))
File "/opt/membase/1.6.2/bin/ep_engine/management/mc_bin_client.py", line 160, in sasl_auth_start
return self._doCmd(memcacheConstants.CMD_SASL_AUTH, mech, data)
File "/opt/membase/1.6.2/bin/ep_engine/management/mc_bin_client.py", line 94, in _doCmd
return self._handleSingleResponse(opaque)
File "/opt/membase/1.6.2/bin/ep_engine/management/mc_bin_client.py", line 87, in _handleSingleResponse
cmd, opaque, cas, keylen, extralen, data = self._handleKeyedResponse(myopaque)
File "/opt/membase/1.6.2/bin/ep_engine/management/mc_bin_client.py", line 83, in _handleKeyedResponse
raise MemcachedError(errcode, rv)
mc_bin_client.MemcachedError: Memcached error #32: Auth failure
==============================================================================