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d7db5701a3
The built-in Webserver's `on_path`, `on_query_string` and `on_url` callbacks may be called multiple times from the parser; we must not simply replace the old values, but need to concatenate the new values instead. This appears to be tricky for `on_path` due to the path normalization, so we fail if the function is called again. The built-in Webserver logs errors during request parsing to stderr, but this is ignored by the php_cli_server framework, and apparently the Webserver does not send a resonse at all in such cases (instead of an 4xx). Thus we can only check that a request with an overly long path fails. Closes GH-7207.