/usr/lib/libreoffice/program/bootstraprc is in libreoffice-common 1:4.2.3~rc3-0ubuntu2.
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 | [ErrorReport]
ErrorReportPort=80
ErrorReportServer=report.libreoffice.org
[Bootstrap]
InstallMode=<installmode>
ProductKey=LibreOffice 4.2
UserInstallation=$SYSUSERCONFIG/libreoffice/4
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