Support for QNX 7.1/8.0

[pkleymonov-qnx]

I have prepared QNX port for qnx version 7.1 and 8.0
The build and test setup provided on https://github.com/qnx-ports/build-files/tree/main/ports/restbed
I have also created a draft PR: #548

Could you please give me a hint if QNX port could be included?

[ben-crowhurst]

We can certainly take a deeper look into this and schedule for an upcoming release.