pon does nothing when run by users
All my users are in groups dip and dialout. They've relogged in. Now
when users run "pon demand-wvdial" pppd starts, but the modem doesn't DO
anything. When root runs the same command, busy modem dialing ensues.
Similarly, when poff is run as user, and pon had been called previously
by root, it complains thusly:
/usr/bin/poff: /bin/kill failed. None stopped.
-rwxr-xr-x root root /bin/kill
-rwsr-xr-- root dip /usr/sbin/pppd