Function cups_sys::inet6_opt_append

pub unsafe extern "C" fn inet6_opt_append(
    arg1: *mut c_void, 
    arg2: socklen_t, 
    arg3: c_int, 
    arg4: __uint8_t, 
    arg5: socklen_t, 
    arg6: __uint8_t, 
    arg7: *mut *mut c_void
) -> c_int