Suricata

Small update on this: most of the update has been done, and pushed on https://github.com/chifflier/suricata/tree/dev/nom5-v1
This is a rather intrusive update, only the first part is done here (basic upgrade to nom 5). A second PR will be written later to update parsers to use functions and closures instead of macros, but has been split for readability/review reasons.

Some unit tests (cargo test) broke, and are being fixed.

Sidenote: having unit tests in cargo test is great for spotting these kind of regressions, we must encourage people to write them!

Thanks Pierre, please do a pull request for the straight nom 5 conversion after cbindgen support is merged. I agree the nom 5 switch and then the macro removal PR should be different steps.

Submitted as PR#4523