[fuse] Status report #3

[Ilya Putsikau]

I've almost finished macfuse merge, the task was much larger than I
expected. It was merge with initial macfuse version and more merges to
follow, but I can start testing soon. For now I'm using original
fuse4bsd code for io. macfuse is simplified version of that, it uses
buf io only without directio support. But cluster API is different on
FreeBSD and I'm afraid to break it, will get to it later.

Ilya