dh_gencontrol is a debhelper program that is responsible for generating control files, and installing
them into the DEBIAN directory with the proper permissions.
This program is merely a wrapper around dpkg-gencontrol(1), which calls it once for each package being
acted on (plus related dbgsym packages), and passes in some additional useful flags.
Note that if you use dh_gencontrol, you must also use dh_builddeb(1) to build the packages. Otherwise,
your build may fail to build as dh_gencontrol (via dpkg-gencontrol(1)) declares which packages are built.
As debhelper automatically generates dbgsym packages, it some times adds additional packages, which will
be built by dh_builddeb(1).