WIP: remove the old database abstraction layer

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

while here:
- remove: TextStream, SLog, TexTextStream

winixd/plugins/export/exportinfo.h

@@ -5,7 +5,7 @@
  */
 
 /* 
- * Copyright (c) 2011-2021, Tomasz Sowa
+ * Copyright (c) 2011-2024, Tomasz Sowa
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
@@ -36,7 +36,6 @@
 #define headerfile_winix_plugins_export_exportinfo
 
 #include "core/system.h"
-#include "db/db.h"
 #include "export.h"
 #include "edb.h"
 #include "message.h"
@@ -61,7 +60,6 @@ public:
 	void SetSystem(System * psystem);
 	void SetConfig(Config * pconfig);
 	void SetEDb(EDb * pdb);
-	void SetDb(Db * pdb);
 	void SetExportThread(ExportThread * pexport_thread);
 
 	void ReadExportDirs();
@@ -83,7 +81,6 @@ private:
 	System * system;
 	Config * config;
 	EDb * edb;
-	Db * db;
 	ExportThread * export_thread;
 
 	bool use_rsa;