WIP: remove the old database abstraction layer

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

while here:
- remove: TextStream, SLog, TexTextStream

winixd/models/winixmodelconnector.h

@@ -5,7 +5,7 @@
  */
 
 /*
- * Copyright (c) 2021, Tomasz Sowa
+ * Copyright (c) 2021-2024, Tomasz Sowa
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,7 +47,6 @@ class Dirs;
 class Mounts;
 class Users;
 class Groups;
-class SLog;
 class Session;
 class Locale;
 class SessionManager;
@@ -69,7 +68,6 @@ public:
 	Mounts *  get_winix_mounts();
 	Users *   get_winix_users();
 	Groups *  get_winix_groups();
-	SLog *    get_winix_session_logger();
 	Session * get_winix_session();
 	Locale *  get_winix_locale();
 	SessionManager * get_winix_session_manager();
@@ -84,7 +82,6 @@ public:
 	const Mounts *  get_winix_mounts() const;
 	const Users *   get_winix_users() const;
 	const Groups *  get_winix_groups() const;
-	const SLog *    get_winix_session_logger() const;
 	const Session * get_winix_session() const;
 	const Locale *  get_winix_locale() const;
 	const SessionManager * get_winix_session_manager() const;
@@ -98,7 +95,6 @@ public:
 	void set_winix_mounts(Mounts * mounts);
 	void set_winix_users(Users * users);
 	void set_winix_groups(Groups * groups);
-	void set_winix_session_logger(SLog * slog);
 	void set_winix_session(Session * session);
 	void set_winix_locale(Locale * locale);
 	void set_winix_session_manager(SessionManager * session_manager);
@@ -115,7 +111,6 @@ protected:
 	Mounts * mounts;
 	Users * users;
 	Groups * groups;
-	SLog * slog;
 	Session * session;
 	Locale * locale;
 	SessionManager * session_manager;