Function phper_sys::php_stream_xport_sendto

pub unsafe extern "C" fn php_stream_xport_sendto(
    stream: *mut php_stream, 
    buf: *const c_char, 
    buflen: usize, 
    flags: c_int, 
    addr: *mut c_void, 
    addrlen: socklen_t
) -> c_int