Merge branch 'backport/jk/curl-avoid-deprecated-api' into maint-2.30

Deal with a few deprecation warning from cURL library. * jk/curl-avoid-deprecated-api: http: support CURLOPT_PROTOCOLS_STR http: prefer CURLOPT_SEEKFUNCTION to CURLOPT_IOCTLFUNCTION http-push: prefer CURLOPT_UPLOAD to CURLOPT_PUT