Enable FFS extended attributes in GENERIC?

[Emmanuel Dreyfus]

Hello

Is there any opposition to enable FFS extended attributes in
GENERIC?

I have been using them for a while and it seems stable, The
relevant code is only involved if the filesystem is explicitely
mounted with -o extattr, which means a bug will not affect people
that do not use the feature.

The only issues are:
- storage in sparse file (like ancient quota) means fsck do not
know about it and cannot repair it.
- dump/restore/pax ignore extended attributes (cp and mv preserve them)

It means FFS extended attributes in NetBSD are fragile and that one
should be ready to loose them, but that leaves some reasonable usages.