/usr/share/ipa/ipa-sidgen-task-run.ldif is in freeipa-server 4.7.0~pre1+git20180411-2ubuntu2.
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 | dn: cn=sidgen,cn=ipa-sidgen-task,cn=tasks,cn=config
changetype: add
objectClass: top
objectClass: extensibleObject
cn: sidgen
# $SUFFIX must be replaced with the base DN of the IPA directory tree
nsslapd-basedn: $SUFFIX
# delay specifies the time the task should sleep between the generation of SIDs
# in nanoseconds
delay: 0
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