added: TextStream a class similar to std::ostringstream

but with a Clear() method
       the dynamic allocated buffer can be easily reused
added: DbTextStream a special version of a stream
       used to create a database string query
       everything is escaped by default
added: DbBase a base class with some basic methods for communicating
       with the database
added: DbConn a class for managing connection to the database
changed: some refactoring in Db class       



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@655 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/config.h

@@ -39,6 +39,10 @@ public:
 	// default: 1
 	int log_request;
 
+	// logging db queries
+	// default: false
+	bool log_db_query;
+
 	// request delimiter in the log file, default "---------"
 	std::string log_delimiter;