Undo removal of method parameters.

This should be done on a separate branch for a different pull request.

Duplicati/Library/Main/BackendManager.cs

@@ -272,7 +272,7 @@ namespace Duplicati.Library.Main
                 public string Newname;
             }
 
-            public DatabaseCollector(LocalDatabase database)
+            public DatabaseCollector(LocalDatabase database, IBackendWriter stats)
             {
                 m_database = database;
                 m_dbqueue = new List<IDbEntry>();
@@ -376,7 +376,7 @@ namespace Duplicati.Library.Main
             m_numberofretries = options.NumberOfRetries;
             m_retrydelay = options.RetryDelay;
 
-            m_db = new DatabaseCollector(database);
+            m_db = new DatabaseCollector(database, statwriter);
 
             m_backend = DynamicLoader.BackendLoader.GetBackend(m_backendurl, m_options.RawOptions);
             if (m_backend == null)

Duplicati/Library/Utility/DirectStreamLink.cs

@@ -399,6 +399,9 @@ namespace Duplicati.Library.Utility
         /// </summary>
         public class DataPump
         {
+            /// <summary> Default buffer size for pumping </summary>
+            public const int DEFAULTBUFSIZE = 1 << 14; // 16K
+
             private readonly bool m_closeInputWhenDone, m_closeOutputWhenDone;
             private readonly Action<DataPump> m_callbackFinalizePumping = null;
             private Stream m_input, m_output;
@@ -412,7 +415,7 @@ namespace Duplicati.Library.Utility
             /// <param name="callbackFinalizePumping"> A callback to issue when pumping is done but before streams are closed. e.g. Can add data to output. </param>
             /// <param name="dontCloseInputWhenDone"> Disable auto close of input stream when pumping is done. </param>
             /// <param name="dontCloseOutputWhenDone"> Disable auto close of output stream when pumping is done. </param>
-            public DataPump(Stream input, Stream output
+            public DataPump(Stream input, Stream output, int bufsize = DEFAULTBUFSIZE
                 , Action<DataPump> callbackFinalizePumping = null
                 , bool dontCloseInputWhenDone = false, bool dontCloseOutputWhenDone = false)
             {