ZP-641 make backend permanent storage per device and user.

Released under the Affero GNU General Public License (AGPL) version 3.

contrary to what doc says (InitializePermanentStorage)
backend permanent storage is only per device

This fixes problem with multiple account using imap backend
on the same device
Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>

src/lib/core/statemanager.php

@@ -300,7 +300,7 @@ class StateManager {
             return $this->statemachine->GetState($this->device->GetDeviceId(), IStateMachine::BACKENDSTORAGE, $this->uuid, $this->oldStateCounter, $this->deleteOldStates);
         }
         else {
-            return $this->statemachine->GetState($this->device->GetDeviceId(), IStateMachine::BACKENDSTORAGE, false, $this->device->GetFirstSyncTime());
+            return $this->statemachine->GetState($this->device->GetDeviceId(), IStateMachine::BACKENDSTORAGE, sha1(Request::GetAuthUser()), $this->device->GetFirstSyncTime());
         }
     }
 
@@ -323,7 +323,7 @@ class StateManager {
             return $this->statemachine->SetState($data, $this->device->GetDeviceId(), IStateMachine::BACKENDSTORAGE, $this->uuid, $this->newStateCounter);
         }
         else {
-            return $this->statemachine->SetState($data, $this->device->GetDeviceId(), IStateMachine::BACKENDSTORAGE, false, $this->device->GetFirstSyncTime());
+            return $this->statemachine->SetState($data, $this->device->GetDeviceId(), IStateMachine::BACKENDSTORAGE, sha1(Request::GetAuthUser()), $this->device->GetFirstSyncTime());
         }
     }