[jan] Catch exceptions from NoSQL backends when building indices.
Throw exception if AS is disabled.
Correctly receive and catch NoSQL backends here too.
Actually return object hash and UIDs (Bug #13269).
Fix export of tags

Bug: 13270
Signed-off-by: Jan Schneider <jan@horde.org>
Fix delete of memos

Simple typo in the code...

Bug: 13271
Signed-off-by: Jan Schneider <jan@horde.org>
Fix crash after successful import

Don't overwrite completely different
$storage object with the backend driver.

Detected by using the Kolab driver:
It throws an exception if you call $driver->get('target').

Code structure cloned from nag.

Bug: 13272
Signed-off-by: Jan Schneider <jan@horde.org>