I'm in the process of moving apt-listchanges to C, slowly, and the
attached patch would make it really easier for me to work with dpkg-deb.
The point is that doing chained pipes is pretty annoying from C
(especially if you want to use parallelism in the process), plus it kind
of make sense for many kind of operations where you don't need
--fsys-tarfile anymore: e.g. extracting a single file can be done with: