Duplicity doesn't save ACLs/xattrs (lp:#558385)

[Original report](https://bugs.launchpad.net/bugs/558385) created by **Woland (wolandtel)**
```
Have an ext3 filesystem mounted with -o acl,user_xattr and directory on it
with some files having acls and extended attributes.

duplicity --no-encryption dir file://bk
duplicity --no-encryption file://bk res

Now files in res have no ACLs nor xattrs.

duplicity 0.6.08b (from distro and from sources)

Python 2.5.5

Debian testing GNU/Linux

aiur:/mnt/test# duplicity -v9 --no-encryption alfa/ file://bk
Using archive dir: /root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e
Using backup name: 31f2abd7613ded96f788766f0cbee63e
Import of duplicity.backends.tahoebackend Succeeded
Import of duplicity.backends.rsyncbackend Succeeded
Import of duplicity.backends.imapbackend Succeeded
Import of duplicity.backends.ftpbackend Succeeded
Import of duplicity.backends.localbackend Succeeded
Import of duplicity.backends.webdavbackend Succeeded
Import of duplicity.backends.hsibackend Succeeded
Import of duplicity.backends.cloudfilesbackend Succeeded
Import of duplicity.backends.sshbackend Succeeded
Import of duplicity.backends.giobackend Succeeded
Import of duplicity.backends.botobackend Succeeded
Main action: inc
================================================================================
duplicity 0.6.08b (March 11, 2010)
Args: /usr/bin/duplicity -v9 --no-encryption alfa/ file://bk
Linux aiur 2.6.32.7-aiur #3 SMP Wed Feb 10 20:35:13 YEKT 2010 i686
/usr/bin/python 2.5.5 (r255:77872, Feb  1 2010, 19:53:42)
[GCC 4.4.3]
================================================================================
Using temporary directory /tmp/duplicity-a5WVEO-tempdir
Registering (mkstemp) temporary file /tmp/duplicity-a5WVEO-tempdir/mkstemp-
AMb2kK-1
Temp has 249462784 available, backup will use approx 34078720.
Synchronizing remote metadata to local cache...
Deleting local
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-full-
signatures.20100408T115330Z.sigtar.gz (not authoritative at backend).
Deleting local
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-
full.20100408T115330Z.manifest (not authoritative at backend).
0 files exist on backend
0 files exist in cache
Extracting backup chains from list of files: []
Last full backup date: none
Collection Status
-----------------
Connecting with backend: LocalBackend
Archive dir: /root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e

Found 0 secondary backup chains.
No backup chains with active signatures found
No orphaned or incomplete backup sets found.
No signatures found, switching to full backup.
Using temporary directory
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-AWuhUl-
tempdir
Registering (mktemp) temporary file
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-AWuhUl-
tempdir/mktemp-P4y5eN-1
Using temporary directory
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-
ZR3L5J-tempdir
Registering (mktemp) temporary file
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-
ZR3L5J-tempdir/mktemp-OP8eXA-1
AsyncScheduler: instantiating at concurrency 0
Registering (mktemp) temporary file /tmp/duplicity-a5WVEO-tempdir/mktemp-
ArJkgN-2
Selecting alfa
Comparing () and None
Getting delta of (() alfa dir) and None
A .
Selecting alfa/file
Comparing ('file',) and None
Getting delta of (('file',) alfa/file reg) and None
A file
Selecting alfa/test
Comparing ('test',) and None
Getting delta of (('test',) alfa/test reg) and None
A test
Selecting alfa/
Comparing ('\xed\xf4',) and None
Getting delta of (('\xed\xf4',) alfa/reg) and None
A
Selecting alfa/
Comparing ('\xf2\xe5\xf1\xf2',) and None
Getting delta of (('\xf2\xe5\xf1\xf2',) alfa/ reg) and None
A
Removing still remembered temporary file
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-AWuhUl-
tempdir/mktemp-P4y5eN-1
Cleanup of temporary file
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-AWuhUl-
tempdir/mktemp-P4y5eN-1 failed
Removing still remembered temporary file
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-
ZR3L5J-tempdir/mktemp-OP8eXA-1
Cleanup of temporary file
/root/.cache/duplicity/31f2abd7613ded96f788766f0cbee63e/duplicity-
ZR3L5J-tempdir/mktemp-OP8eXA-1 failed
AsyncScheduler: running task synchronously (asynchronicity disabled)
Writing bk/duplicity-full.20100408T120817Z.vol1.difftar.gz
Deleting /tmp/duplicity-a5WVEO-tempdir/mktemp-ArJkgN-2
Forgetting temporary file /tmp/duplicity-a5WVEO-tempdir/mktemp-ArJkgN-2
AsyncScheduler: task completed successfully
Processed volume 1
Writing bk/duplicity-full-signatures.20100408T120817Z.sigtar.gz
Writing bk/duplicity-full.20100408T120817Z.manifest
3 files exist on backend
2 files exist in cache
Extracting backup chains from list of files: ['duplicity-
full.20100408T120817Z.manifest', 'duplicity-
full.20100408T120817Z.vol1.difftar.gz', 'duplicity-full-
signatures.20100408T120817Z.sigtar.gz']
File duplicity-full.20100408T120817Z.manifest is not part of a known set;
creating new set
File duplicity-full.20100408T120817Z.vol1.difftar.gz is part of known set
File duplicity-full-signatures.20100408T120817Z.sigtar.gz is not part of a
known set; creating new set
Ignoring file (rejected by backup set) 'duplicity-full-
signatures.20100408T120817Z.sigtar.gz'
Found backup chain [Thu Apr  8 18:08:17 2010]-[Thu Apr  8 18:08:17 2010]
--------------[ Backup Statistics ]--------------
StartTime 1270728497.40 (Thu Apr  8 18:08:17 2010)
EndTime 1270728497.42 (Thu Apr  8 18:08:17 2010)
ElapsedTime 0.01 (0.01 seconds)
SourceFiles 5
SourceFileSize 1024 (1.00 KB)
NewFiles 5
NewFileSize 1024 (1.00 KB)
DeletedFiles 0
ChangedFiles 0
ChangedFileSize 0 (0 bytes)
ChangedDeltaSize 0 (0 bytes)
DeltaEntries 5
RawDeltaSize 0 (0 bytes)
TotalDestinationSizeChange 220 (220 bytes)
Errors 0
-------------------------------------------------

Removing still remembered temporary file /tmp/duplicity-a5WVEO-
tempdir/mkstemp-AMb2kK-1
```

Story points: 136.0