INN and bug-finding tools

[Richard Kettlewell]

I think I'm reaching the point of diminishing returns with the Clang
analyzer, which is why I've switched strategy to valgrind for the time
being.

In the interests of avoiding duplicated work, has anyone else used any
of the following with INN:

- Coverity (they have a free service for free sw, which I've used on a
couple of my own projects)
- -fsanitize=... options to GCC/Clang
- afl-fuzz

ttfn/rjk