Work around issue #69

For now we enforce HTTP/1.1, which *works*.

Author: cmb69

Diff for: lib/php/libsdk/SDK/FileOps.php

@@ -137,6 +137,9 @@ protected function download(string $url, string $dest_fn = NULL) : ?string
 		curl_setopt($ch, CURLOPT_USERAGENT, Config::getSdkUserAgentName());
 		curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
 
+		// workaround for <https://github.com/microsoft/php-sdk-binary-tools/issues/69>
+		curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
+
 		$ret = curl_exec($ch);
 
 		$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);