/usr/share/doc/request-tracker4/UPGRADING-2.0 is in request-tracker4 4.4.2-2.
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 | =head1 UPGRADING FROM 2.x
The core RT distribution does not contain the tool to upgrade RT from version
2.0; the tool, can be downloaded from CPAN at
http://search.cpan.org/dist/RT-Extension-RT2toRT3/
Further instructions may be found in that distribution's README file.
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