either PAM_RHOST or PAM_TTY against /etc/login.access.o
This uncovers a problem with PAM_RHOST, in that if we always set it, there
is no way to distinguish between a user logging in locally and a user
logging in using 'ssh localhost'. This will be fixed by first making sure
that all PAM modules can handle PAM_RHOST being unset (which is currently
not the case), and then modifying su(1) and login(1) to not set it for
local logins.
Sponsored by: DARPA, NAI Labs
