namei: Fix cn_flags width in various places

[markj]

Summary

This truncation is mostly harmless today, but fix it anyway to avoid
pain later down the road.

[kib]

sys/fs/fuse/fuse_vnops.c

1434

Also I cannot match the local sources for fuse_vnops.c with the patch. In my copy there is also a line

	int flags = cnp->cn_flags;

which clearly needs fixing.

[olce]

Thanks.

sys/fs/fuse/fuse_vnops.c

1434

Also I cannot match the local sources for fuse_vnops.c with the patch.

It is also in the base here, but Mark removed it. This might be a potential subtle change in semantics, as cn_flags is modified below between former uses of flags (the only test performed on flags was whether ISDOTDOT was present, which I suspect is never changed, but didn't check thoroughly).

[markj]

sys/fs/fuse/fuse_vnops.c

1434

I got rid of the local flags variable, indeed, as the code below uses both flags and cnp->cn_flags, which seems confusing.

[markj]

Convert a predicate to a bool

[kib]

sys/fs/fuse/fuse_vnops.c

1434

I also would add bool isdotdot

[markj]

Add another flag variable.

[olce]

Much clearer with a bool indeed, and solves my concern.