This introduces a minimum value of 1 second for timeouts passed to cURL.
Internally, cURL uses alarm() for interrupts, which accepts a second-resolution timeout. Any values lower than 1 second are instantly failed rather than being rounded upwards. While this makes the experience worse for those using asynchronous DNS lookups, there's no way to detect which DNS resolver is being used from PHP.
See #33055, #8923.
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