[SRU Natty/Oneiric/Precise] eCryptfs: Copy up POSIX ACL and read-only flags from lower mount

[John Johansen]

On 08/06/2012 12:04 PM, Tim Gardner wrote:
> From: Tyler Hicks <tyhicks at canonical.com>
> 
> When the eCryptfs mount options do not include '-o acl', but the lower
> filesystem's mount options do include 'acl', the MS_POSIXACL flag is not
> flipped on in the eCryptfs super block flags. This flag is what the VFS
> checks in do_last() when deciding if the current umask should be applied

looks good to me

Ackedy-by: John Johansen <john.johansen at canonical.com>