* libc/include/sys/unistd.h: Add prototypes for endusershell(),

getusershell(), iruserok(), revoke(), ruserok() and setusershell()
	when __CYGWIN__ is defined.
	* libc/sys/cygwin/sys/utmp.h: Add prototypes for login_tty() and
	logwtmp().

newlib/libc/sys/cygwin/sys/utmp.h

@@ -50,6 +50,8 @@ extern void utmpname (const char *);
 
 void login (struct utmp *);
 int logout (char *);
+int login_tty (int);
+void logwtmp (char *, char *, char *);
 
 #ifdef __cplusplus
 }