WIP: remove the old database abstraction layer

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

while here:
- remove: TextStream, SLog, TexTextStream

winixd/functions/sort.cpp

@@ -5,7 +5,7 @@
  */
 
 /* 
- * Copyright (c) 2011-2022, Tomasz Sowa
+ * Copyright (c) 2011-2024, Tomasz Sowa
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
@@ -34,6 +34,7 @@
  
 #include <algorithm>
 #include "sort.h"
+#include "core/misc.h"
 #include "core/plugin.h"