environment so that it matches the ROOTBACKUP and CHECKFILESYSTEMS way
of doing things
- make the sort command use "-k" instead of the deprecated "+" option
(idea from mk@)
- rotate /var/log/wtmp every week just after weekly ac(8) completes
ok mk@

(output logs are still umask 077)
"i think this is right" deraadt@

ok millert@

newsyslog truncates wtmp on a weekly basis; note that the ac stuff
remains commented out as before;
spotted by andreas bihlmaier;
ok deraadt@

millert@ ok

needed and we don't ship it anyway; millert@ ok.

database owned by non-root at any time.

as bin not nobody to avoid NFS problems.