Request100ContinueMode
Mode for applying expect-continue to a PUT request.
Always = 1
Expect-continue will be applied regardless of recent error status. There may be
some additionally defined thresholds for applying the header.
Auto = 0
If no options are provided, this is the default behavior.
Expect-continue will not be applied until specific errors are encountered from the service, at which point they will be applied until a period of time after the last of those errors occured.
Response codes that trigger this behavior are 429, 500, and 503.
Never = 2
Expect-Continue will never be applied.