proxy tries to process failed response from server

if proxy asks for config data from the server but there is no proxy with such name, previously we would log a message "Proxy host name might not be matching that on the server."

now it's :

979:20131105:160656.160 Received configuration data from server. Datalen 23
979:20131105:160656.160 failed to update local proxy configuration copy: Can't open JSON object or array ""failed"}"

even the first message here should not appear, it should only be logged when actual received data is ok