int CtdlIsSingleUser(void);
+int CtdlIsUserLoggedIn (char *user_name);
+int CtdlIsUserLoggedInByNum (long usernum);
+void CtdlBumpNewMailCounter(long which_user);
+
+
/*
* CtdlGetCurrentMessageNumber() - Obtain the current highest message number in the system
* This provides a quick way to initialise a variable that might be used to indicate