/etc/insserv/overrides/kdm is in debian-edu-config 1.818+deb8u2.
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 10 | # BTS #584434, adding krb5-kdc to the should-start line
### BEGIN INIT INFO
# Provides: kdm
# Required-Start: $local_fs $remote_fs
# Required-Stop: $local_fs $remote_fs
# Should-Start: console-screen kbd acpid dbus hal krb5-kdc
# Should-Stop: console-screen kbd
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
### END INIT INFO
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