Function usage

lib_acl_cpp/samples/http_request/main.cpp:158–165

//////////////////////////////////////////////////////////////////////////

static void usage(const char* procname)
{
	printf("usage: %s -h[help]\r\n", procname);
	printf("options:\r\n");
	printf("\t-f request file\r\n");
	printf("\t-t request stype[xml/json/plain]\r\n");
	printf("\t-c request file's charset[gb2312/utf-8]\r\n");
}

int main(int argc, char* argv[])
{