Add support for retry options

[ecampidoglio]

Curl has built-in functionality to automatically retry a failed request. This behavior is controlled primarily with three options:

• --retry <num> the number of time curl should retry the request before giving up
• --retry-delay <seconds> the amount of time to wait between retries
• --retry-max-time <seconds> the maximum amount of time to wait before retries

By default, curl will increment the delay between attempts by doubling the last waiting time, starting from 1 second until it reaches the value specified in --retry-max-time or 10 minutes. Although this behavior should cover most scenarios, it's possible to override it by setting a fixed delay right from the start with the --retry-delay option

It would be nice if Cake.Curl exposed these options through the CurlSettings class.

[deqenq]

@ecampidoglio Can I take care of this issue? I also suggest to support options --retry-connrefused (since curl version 7.52.0) , --max-time and --connect-timeout. All these options relates to controlling retry mechanism.

[ecampidoglio]

@deqenq Sure! I think it's a good idea to include --retry-connrefused, but I would rather treat --max-time and --connect-timeout as a separate feature. Even though they do affect the retry mechanism, these options have a larger scope.

[deqenq]

@ecampidoglio PR sent. Added configuration options:

• --retry
• --retry-delay
• --retry-max-time
• --retry-connrefused

Later I will add these two options in separate PR:

• --max-time
• --connect-timeout

[ecampidoglio]

@deqenq Merged in 1bb6a24. Thank you for your contribution! 🎉