WIP: remove the old database abstraction layer

remove such classes:
- DbBase
- DbConn
- DbTextStream
- Db

while here:
- remove: TextStream, SLog, TexTextStream

winixd/core/dirs.cpp

@@ -5,7 +5,7 @@
  */
 
 /* 
- * Copyright (c) 2008-2021, Tomasz Sowa
+ * Copyright (c) 2008-2024, Tomasz Sowa
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
@@ -42,13 +42,6 @@ namespace Winix
 {
 
 
-
-void Dirs::SetDb(Db * pdb)
-{
-	db = pdb;
-}
-
-
 void Dirs::SetCur(Cur * pcur)
 {
 	cur = pcur;