sqlite: Use per-thread connections

database/sqlitedao.h

@@ -12,20 +12,20 @@
 class SqliteDao
 {
   protected:
-	std::shared_ptr<sqlite::database> db;
+	sqlite::database *db = nullptr;
 
   public:
 	SqliteDao()
 	{
 	}
 
-	SqliteDao(std::shared_ptr<sqlite::database> db)
+	SqliteDao(sqlite::database &db)
 	{
-		this->db = db;
+		this->db = &db;
 	}
-	void setDb(std::shared_ptr<sqlite::database> db)
+	void setDb(sqlite::database &db)
 	{
-		this->db = db;
+		this->db = &db;
 	}
 
 	inline void throwFrom(const sqlite::sqlite_exception &e) const