Fix storing user groups in databases not working

Legacy(?) code that deallocated database instance before returning it
and allowing to use `MutableText` as a key for database.

sources/Data/Database/DBAPI.uc

@@ -250,48 +250,49 @@ public final function LocalDatabaseInstance LoadLocal(BaseText databaseName)
     local DBRecord              rootRecord;
     local Text                  rootRecordName;
     local LocalDatabase         newConfig;
-    local LocalDatabaseInstance newLocalDBInstance;
+    local LocalDatabaseInstance newLocalDBInstance, result;
     local Text                  dbKey;
 
     if (databaseName == none) {
         return none;
     }
     CreateLocalDBMapIfMissing();
-    if (loadedLocalDatabases.HasKey(databaseName))
+    dbKey = databaseName.Copy();
+    if (loadedLocalDatabases.HasKey(dbKey))
     {
-        return LocalDatabaseInstance(loadedLocalDatabases
-            .GetItem(databaseName));
+        result = LocalDatabaseInstance(loadedLocalDatabases.GetItem(dbKey));
+        _.memory.Free(dbKey);
+        return result;
     }
-    //  No need to check `databaseName` for being valid,
+    //  No need to check `dbKey` for being valid,
     //  since `Load()` will just return `none` if it is not.
-    newConfig = class'LocalDatabase'.static.Load(databaseName);
+    newConfig = class'LocalDatabase'.static.Load(dbKey);
     if (newConfig == none) {
+        _.memory.Free(dbKey);
         return none;
     }
     if (!newConfig.HasDefinedRoot() && !newConfig.ShouldCreateIfMissing()) {
+        _.memory.Free(dbKey);
         return none;
     }
     newLocalDBInstance = LocalDatabaseInstance(_.memory.Allocate(localDBClass));
-    dbKey = databaseName.Copy();
     loadedLocalDatabases.SetItem(dbKey, newLocalDBInstance);
     dbKey.FreeSelf();
     if (newConfig.HasDefinedRoot())
     {
         rootRecordName = newConfig.GetRootName();
-        rootRecord = class'DBRecord'.static
-            .LoadRecord(rootRecordName, databaseName);
+        rootRecord = class'DBRecord'.static.LoadRecord(rootRecordName, dbKey);
     }
     else
     {
-        rootRecord = class'DBRecord'.static.NewRecord(databaseName);
+        rootRecord = class'DBRecord'.static.NewRecord(dbKey);
         rootRecordName = _.text.FromString(string(rootRecord.name));
         newConfig.SetRootName(rootRecordName);
         newConfig.Save();
     }
     newLocalDBInstance.Initialize(newConfig, rootRecord);
-    _.logger.Auto(infoLocalDatabaseLoaded).Arg(databaseName.Copy());
+    _.logger.Auto(infoLocalDatabaseLoaded).Arg(dbKey);
     _.memory.Free(rootRecordName);
-    _.memory.Free(newLocalDBInstance);
     return newLocalDBInstance;
 }