mount -o extattr (extended attributes)

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

Hello

Here is a patch that adds mount -o extattr for auto-enabling UFS1
extended attributes.
http://ftp.espci.fr/shadow/manu/mount_extattr.patch

Any comment on it before I commit?

The next step is to add UFS_EXTATTR to GENERIC, XEN3_DOM0 and XEN3_DOMU
kernels (and others? which ones?). If there a smart way, or should I 
do it for all ports?

-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost