winix can drop privileges now (if started as the root)

added parameters to the config:
 user (string)
 group (string)
 additional_groups (bool)



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@668 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/config.cpp

@@ -89,6 +89,10 @@ bool Config::ReadConfig(bool errors_to_stdout_, bool stdout_is_closed)
 
 void Config::AssignValues(bool stdout_is_closed)
 {
+	user  = Text("user");
+	group = Text("group");
+	additional_groups = Bool("additional_groups", true);
+
 	log_file          = Text("log_file");
 	log_notify_file   = Text("log_notify_file");
 	log_delimiter     = Text("log_delimiter", "---------------------------------------------------------------------------------");