22/5/94	-	S.R.Usher	login.c
	In setenv changed buffer from being automatic to static so as to get
around the problem of a small stack.

24/5/94	-	S.R.Usher	login.c
	Added "rootlogin = 0;" after test for (pwd && !rval) so as to fix
security bug which allows people to login with pid 0 if they first try to
login as root then successfully login as another user.

20/6/94	-	Tesche		login.c
	Change mode of tty to 0620 before chowning it.
