/usr/lib/libreoffice/program/bootstraprc is in libreoffice-common 1:6.0.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [Bootstrap]
InstallMode=<installmode>
ProductKey=LibreOffice 6.0
UserInstallation=$SYSUSERCONFIG/libreoffice/4
|