3 cancellation race concerns - better tracking of kernel feedback?
8 isochronous endpoint I/O
10 abstraction for cross-platform-ness
14 optional timerfd support (runtime detection)
15 notifications of hotplugged/unplugged devices
16 use poll() rather than select()?
18 1.0 API style/naming points to reconsider
19 =========================================
21 struct libusb_(bulk|control)_transfer or parameters?
23 urbh in general (should this be a transfer handle?)
25 config struct/function naming