/etc/logrotate.d/exim4-paniclog is in exim4-base 4.84.2-2+deb8u5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | /var/log/exim4/paniclog {
size 10M
missingok
rotate 10
compress
delaycompress
notifempty
create 640 Debian-exim adm
}
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