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.cpp

@@ -99,6 +99,7 @@ void Config::AssignValues(bool stdout_is_closed)
 	log_level         = Int("log_level", 1);
 	log_request       = Int("log_request", 1);
 	log_stdout        = Bool("log_stdout", false);
+	log_db_query      = Bool("log_db_query", false);
 	
 	post_file_max       = Int("post_file_max", 8388608); // 8 MB
 	auth_simplefs_dir   = Text("auth_simplefs_dir");