Enable fuse permission checks and remove unused unionfs_access() function.
Enable fuse permission checks and remove unused unionfs_access() function.

kissthink/unionfs-fuse-1,yogoloth/unionfs-fuse,kissthink/unionfs-fuse-1,evnu/unionfs-fuse,evnu/unionfs-fuse,jrk/unionfs-fuse,jrk/unionfs-fuse,jrk/unionfs-fuse,yogoloth/unionfs-fuse,jrk/unionfs-fuse,kissthink/unionfs-fuse-1,evnu/unionfs-fuse,yogoloth/unionfs-fuse