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CURLMOPT_MAX_CONCURRENT_STREAMS - set max concurrent streams for http2

#include <curl/curl.h>

CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_CONCURRENT_STREAMS,
 long max);

Pass a long indicating the max. The set number will be used as the maximum number of concurrent streams for a connections that libcurl should support on connections done using HTTP/2. Valid values range from 1 to 2147483647 (2^31 - 1) and defaults to 100. The value passed here would be honoured based on other system resources properties. 100 All

 CURLM *m = curl_multi_init();
 /* max concurrent streams 200 */
 curl_multi_setopt(m, CURLMOPT_MAX_CONCURRENT_STREAMS, 200L);

Added in 7.67.0 Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not. CURLOPT_MAXCONNECTS "(3), " CURLMOPT_MAXCONNECTS "(3), "