oss-fuzz integration
Now that libslirp is standalone, we can integrate it with Google OSS Fuzz: https://github.com/google/oss-fuzz/
I have a WIP branch: https://gitlab.freedesktop.org/elmarco/libslirp/commits/fuzz
The corpus covers only 25% of the code base at this point. oss-fuzz coverage doesn't work for some reason.
Otherwise it should be ready to get integrated.