Jocelyn Le Sage 388fff84f2 Fixes for the server reachability test.
- Do not apply HTTPs redirection for challenge used by the test.
- Set the `User-Agent` to avoid 403 answer from site24x7.com.
- Handle JSON parsing failure of the received body.
- Better handling of different error cases.
2023-12-19 17:22:33 -05:00
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