[Libguestfs] [PATCH nbdkit v2 0/5] fuzzing: Recommend combining fuzzing with ASAN

v1 was here: https://listman.redhat.com/archives/libguestfs/2022-April/028568.html v2: - Picked up Reviewed-by line for first patch. - Split second patch into 3 parts. Add ASAN_OPTIONS which is necessary for the tests to run successfully under ASAN. - Third patch has been extensively modified based on actually now doing fuzzing of nbdkit with ASAN. In particular it's necessary to set ASAN_OPTIONS when fuzzing to avoid bogus failures. - Document why -m 256 was dropped.