[php-src] PR #22938: ext/curl: hide sensitive parameters to curl_setopt

Pull Request: https://github.com/php/php-src/pull/22938 Author: Sjord This makes it possible to mark parameters as sensitive at runtime. curl_setopt takes many types of parameters, of which only some are secret. This tries to hide the sensitive values in stack traces, while still showing benign values. I am not sure this is a good idea, please let me know what you think. Ping @TimWolla, as the author of https://wiki.php.net/rfc/redact_parameters_in_back_traces.