pragmatism first

CURLOPT_REFERER

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CURLOPT_REFERER(3)	referred by	curl_easy_setopt(3) \| CURLOPT_AUTOREFERER(3) \| CURLOPT_HTTPHEADER(3) \| CURLOPT_USERAGENT(3)
CURLOPT_REFERER(3)	refer to	CURLOPT_HTTPHEADER(3) \| CURLOPT_USERAGENT(3)