- Fix Util.UnixTimeSinceEpoch:

* Unix epoch starts at midnight, not at 8:00am
  * All date/time handling should be done in UTC in the server, not in
    the local timezone.
  * Refactor out repeated computation of a constant value
- Added setting of CreationTime to some places where inventoryitems
  are created
This fixes Mantis#2390.

OpenSim/Region/Environment/Modules/Agent/AssetTransaction/AssetXferUploader.cs

@@ -278,7 +278,7 @@ namespace OpenSim.Region.Environment.Modules.Agent.AssetTransaction
             CachedUserInfo userInfo =
                 m_userTransactions.Manager.MyScene.CommsManager.UserProfileCacheService.GetUserDetails(
                     ourClient.AgentId);
-            
+
             if (userInfo != null)
             {
                 InventoryItemBase item = new InventoryItemBase();
@@ -296,6 +296,7 @@ namespace OpenSim.Region.Environment.Modules.Agent.AssetTransaction
                 item.EveryOnePermissions=0;
                 item.NextPermissions = nextPerm;
                 item.Flags = (uint) wearableType;
+                item.CreationDate = Util.UnixTimeSinceEpoch();
 
                 userInfo.AddItem(item);
                 ourClient.SendInventoryItemCreateUpdate(item);