We have a few p.recovery.pto * 3 calculations scattered throughout the codebase. These seem to be used for calculating timeouts. It would be nice to have this logic extracted into its own function.

Examples:

• quiche/quiche/src/lib.rs

  Lines 8452 to 8455 in 83f919f

  	let path_pto = match self.paths.get_active() {
  	Ok(p) => p.recovery.pto(),
  	Err(_) => Duration::ZERO,
  	};

• quiche/quiche/src/lib.rs

  Line 3233 in 83f919f

  timer: now + (recv_path.recovery.pto() * 3),

• quiche/quiche/src/lib.rs

  Line 4706 in 83f919f

  let pto = path.recovery.pto();