v2 was here:
https://www.redhat.com/archives/libguestfs/2020-October/msg00019.html
v3:
* defence -> defense
* Use int64_t instead of int. This compiles on Windows.
* Add GC wrappers to OCaml bindings.
* New FreeBSD patch.
* Removed "pid:" example from the ip filter manual, and added a warning
beside the pid documentation.
Rich.