Tanguy

Can be revisited later, but now at least the compiler is cached so we don't compile every time

Done except the Push Identify

This PR is quite outdated by now

Superseded by #785

Hole-Punching has been implemented for TCP: #826 Remains to add a UPnP / PmP solution, like nim-nat-traversal, or [nim-nat-mapper](https://github.com/status-im/nim-nat-mapper) (a WiP pure nim library)

I assume this will never be reviewed by auditors

I assume this will never be reviewed by auditors

> NFC / Bluetooth NFC is _really_ slow, don't expect to make any meaningful data transfer with it: `424 kbit/s within a distance of approximately 10 centimeters.` Bluetooth can work,...

We know that the tracker is leaking, the point is to reset the state before other tests, otherwise all the following tests will fail. Ideally we would indeed reset all...

Also see https://github.com/status-im/nim-chronos/pull/326, which opens the question "should closing the dispatcher close the associated FDs" (which could have been moved elsewhere)