[Samba] doc & examples bug regarding 'xattr' special switch need

[Linda Walsh]

This may already be fixed, but various places talk about the need
for a 'user_xattr' switch on mounts to use extended attributes.

I've never known 'xfs' to have such a switch -- if they are enabled
in the kernel, they just work -- I tried it.

I also tried adding the switch and verified it is not an accepted
switch for XFS.   Is the documentation referring to some newer
filesystem that has incompatible options (regarding external 
attributes)?   

I'm running a stock SuSE kernel and they are enabled by default (and
fully available to non-root users).