Ever since the first GSoC contribution, fusefs has had a curious
behavior. If the daemon hasn't finished responding to FUSE_INIT,
fuse_vnop_getattr would reply to VOP_GETATTR requests for the mountpoint
by returning all zeros. I don't know why. It isn't necessary for
unmounting, even if the daemon is dead.
Delete that behavior. Now VOP_GETATTR for the mountpoint will wait for
the daemon to be ready, just like it will for any other vnode.
Reported by: Vassili Tchersky
MFC after: 2 weeks
Sponsored by: ConnectWise