...but installed on all Debian versions. This is mostly required by
vebose file list in debian/qubes-core-agent.install. But also make it
use new options when upstream will set them.
QubesOS/qubes-issues#2161
This reverts commit 5dfcf06ef4.
python3-daemon isn't widespread enough yet - for Debian jessie available
only in packports.
In addition to the revert itself, adjust packaging for this change
(mostly for Debian).
Add --install-layout=deb option to setup.py, so files will not land in
/usr/local.
Also, explicitly list packaged files - make it easier to split the
package later.
