LetsEncrypt challenge request times out too soon

[Paul Verity]

The /opt/admin/vendor/analogic/lescript/Lescript.php script that sends the request to challenge (around line 158) gives up too soon and responds with a validation error. It gives each attempt just one second grace before attempting the challenge again, making 5 attempts in total. This is not long enough for some servers and would fail every time until I modified the script to attempt 6 times at 10 second intervals to allow up to one minute for the verification result. It finally succeeded in obtaining the certificate and applying it after making this change.

I’d like to propose the grace period/retry count is made configurable through the UI, or uses a slightly more sophisticated back-off/retry algorithm

[Mattia]

you could put your modified script here to evaluate the differences

thank you

‌

[SH]

fix #739, fix #740 longer wait for LE's verification

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