debian: remove unused patches/ directory
debian: empty debian/changelog

This file is irrelevant for a custom package.

The version is chosen such that when an "official package" (i.e a
distribution-issued package) is provided, it will replace this one.
debian: conflict with the regular rancid package

This prevents coinstallation with the regular Debian package since the
paths are shared.
debian: use new dh rules

Switch to new-style debhelper.
debian: synchronize debian/control with upstream packaging
debian: synchronize debian/copyright with upstream packaging
debian: ship a commented-out cron file instead of an example
debian: ensure rancid shell is /bin/bash

This is needed to make various tasks work as user rancid without getting
root. Details are here:
 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=654353
debian: also conflicts with par package

rancid ships its own "par"
debian: update translation files (sync with upstream packaging)
debian: remove all debconf warnings

Those warnings are saying that the packaging is experimental and that it
is possible to lose data. There is nothing in the packaging which will
erase any data and the warnings are quite old.
Merge pull request #38 from vincentbernat/fix/debian

Update Debian packaging