add option tcp_keepcnt

Author: m6w6

src/php_http_client_curl.c

@@ -1609,6 +1609,9 @@ static void php_http_curle_options_init(php_http_options_t *registry)
 		Z_LVAL(opt->defval) = 60;
 	}
 #endif
+#if PHP_HTTP_CURL_VERSION(8,9,0)
+	php_http_option_register(registry, ZEND_STRL("tcp_keepcnt"), CURLOPT_TCP_KEEPCNT, IS_LONG);
+#endif
 #if PHP_HTTP_CURL_VERSION(7,49,0)
 # if defined(linux) || defined(__APPLE__)
 	/* CURLOPT_TCP_FASTOPEN is not supported (yet) on Windows */