/usr/share/doc/cron-deja-vu/README.Debian is in cron-deja-vu 0.4-5.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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procmail example config:
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PATH=/usr/bin:/bin
:0f
| /usr/bin/cron-deja-vu -s20
:0
* ^X-deja-vu: yes
.seen/
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-- Florian Reitmeir <florian@reitmeir.org> Fri, 29 Jul 2011 10:11:26 +0200
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