deb-conffiles - package conffiles
A package declares its list of conffiles by including a conffiles
its control archive (i.e. DEBIAN/conffiles
during package creation).
This file contains a list of files, one per line. They should be listed as
absolute pathnames, and should exist in the binary package, otherwise
will ignore them (although by default dpkg-deb(1)
refuse to build such binary packages). Trailing whitespace will be trimmed,
and empty lines will be ignored.