Drop use of dh-cargo. We don’t actually need to use it, and it doesn’t help in any way. In fact, it makes things more difficult, as it insists on using the Debian-packaged cargo.

Add overrides for lintian, the Debian package checker, about a missing manual page, and unstripped binary objects. This helps other warnings in the future stand out better.

Signed-off-by: Lars Wirzenius liw@liw.fi