[fuse] Status report #1

[Ilya Putsikau]

Hello,

I've started preparation work to merge fuse4bsd and macfuse. This week
I was studying code and reducing differences between fuse4bsd and
macfuse. No functional changes was committed.

Macfuse has many style changes and some things are not the same:

fuse_device: similar idea, but Mac has different devfs, cloning, etc
fuse_ipc: message parsing is almost the same, few bits have changed
fuse_vfsops: Mac has different mount subsystem and statfs. FreeBSD
vfs_hash is not used, vnode allocation is different
fuse_vnops: vnode operations are most difficult, not finished yet.