[Samba] Samba 3.x SVN and OS/2 support.

[Jeremy Allison]

Hi all Samba OS/2 users. I've just added OS/2 style
extended attribute support into the SAMBA_3_0 subversion
branch code.

This depends on the underlying OS supporting EA's and
(on linux) the filesystem being mounted with the "user_xattr"
mount option and the parameter "ea support = yes" being set
in smb.conf.

Please check out this code and test it - let me know if there
are any errors with using OS/2 EA's with Samba3 and I'll try
and get them fixed before 3.0.14.

Thanks,

	Jeremy