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fail?	       409 => 'Conflict',
fail?	       410 => 'Gone',
fail	       411 => 'Length Required',
fail	       412 => 'Precondition Failed',
fail	       413 => 'Request Entity Too Large',
fail	       414 => 'Request-URI Too Large',
pass (warn)    415 => 'Unsupported Media Type',
fail (warn)    500 => 'Internal Server Error',
fail (warn)    501 => 'Not Implemented',
fail? (warn)   502 => 'Bad Gateway',
fail->retry?   503 => 'Service Unavailable',  #can mean too busy??
fail	       504 => 'Gateway Timeout',
fail (warn)    505 => 'HTTP Version Not Supported',