Function moq_client_set_backoff_max 

#[unsafe(no_mangle)]
pub extern "C" fn moq_client_set_backoff_max(
    client: u32,
    delay_ms: u64,
) -> i32

Set the ceiling on the growing reconnect delay, in milliseconds.

Defaults to 5s.

Returns zero on success, or a negative code if the handle is unknown.