Add User-Agent header to each HTTP request

util.c

@@ -203,7 +203,7 @@ json_t *json_rpc_call(CURL *curl, const char *url,
 	struct upload_buffer upload_data;
 	json_error_t err = { };
 	struct curl_slist *headers = NULL;
-	char len_hdr[64];
+	char len_hdr[64], user_agent_hdr[128];
 	char curl_err_str[CURL_ERROR_SIZE];
 	long timeout = longpoll ? (60 * 60) : (60 * 10);
 	struct header_info hi = { };
@@ -244,10 +244,12 @@ json_t *json_rpc_call(CURL *curl, const char *url,
 	upload_data.len = strlen(rpc_req);
 	sprintf(len_hdr, "Content-Length: %lu",
 		(unsigned long) upload_data.len);
+	sprintf(user_agent_hdr, "User-Agent: %s", PACKAGE_STRING);
 
 	headers = curl_slist_append(headers,
 		"Content-type: application/json");
 	headers = curl_slist_append(headers, len_hdr);
+	headers = curl_slist_append(headers, user_agent_hdr);
 	headers = curl_slist_append(headers, "Expect:"); /* disable Expect hdr*/
 
 	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);