/etc/logcheck/ignore.d.server/login is in logcheck-database 1.3.17.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ login\[[0-9]+\]: ROOT LOGIN on '(/dev/)?ttyS?[0-9]'$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ login: ROOT LOGIN pts/[0-9] FROM [._[:alnum:]-]+$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ newgrp\[[0-9]+\]: user '[[:alnum:]-]+' \(login '[[:alnum:]-]+' on (pts/[0-9]+|tty[0-9]+)\) (returned|switched) to group '[[:alnum:]-]+'$
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