Fix regression in url encoded salt-api messages
Fix regression in url encoded salt-api messages

Most clients that do url encoding include other data in the Content-Type field (requests for example sets "application/x-www-form-urlencoded; charset=utf-8"). This changes the api to be a more forgiving server which will make any non-list struct a list

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt