[$] Famfs, FUSE, and BPF

The famfs filesystem first showed up on the mailing lists in early 2024; since then, it has been the topic of regular discussions at the Linux Storage, Filesystem, Memory Management and BPF (LSFMM+BPF) Summit. It has also, as result of those discussions, been through some significant changes since that initial posting. So it is not surprising that a suggestion that it needed to be rewritten yet again was not entirely well received. How much more rewriting will actually be needed is unclear, but more discussion appears certain.