Added connection_model setting to the MSRP settings in the account object

Ignore-this: 34a2ea5d83d888759032ee3a26926fea

It may contain 'acm' or 'relay'

darcs-hash:20100621080407-56b4d-5e80a713577fb8144718fa569b303f01641b0962
Raised version and updated changelog

Ignore-this: a0620f268fd65864db5b46298a0a6288

darcs-hash:20100621110105-56b4d-b27cafe96ace474655ffab1099ff66e1068b097b