debian: Lower xdg-utils dependency to suggestion (#6084)
debian: Lower xdg-utils dependency to suggestion (#6084)

xdg-utils pulls in a lot of packages through Recommends: like x11-utils
or libwww-perl that are not necessary/desirable on servers. It is only
being used in our desktop file ("Exec=xdg-open http://localhost:9090").

Lower xdg-utils to Suggests:, as we don't need the desktop file on
servers, and xdg-utils is part of Debian/Ubuntu desktop installations.

(Note that the RPM spec file does not pull in xdg-utils at all.)

Fixes #6080
larsu/cockpit,michalskrivanek/cockpit,garrett/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,larsu/cockpit,dperpeet/cockpit,moraleslazaro/cockpit,xhad/cockpit,xhad/cockpit,cockpit-project/cockpit,dperpeet/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,petervo/cockpit,garrett/cockpit,stefwalter/cockpit,moraleslazaro/cockpit,larskarlitski/cockpit,dperpeet/cockpit,deryni/cockpit,garrett/cockpit,stefwalter/cockpit,deryni/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,michalskrivanek/cockpit,stefwalter/cockpit,mvollmer/cockpit,andreasn/cockpit,SotolitoLabs/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,michalskrivanek/cockpit,Scribery/cockpit,mareklibra/cockpit,andreasn/cockpit,cockpituous/cockpit,petervo/cockpit,Scribery/cockpit,deryni/cockpit,mareklibra/cockpit,Scribery/cockpit,larskarlitski/cockpit,mvollmer/cockpit,dperpeet/cockpit,harishanand95/cockpit,mareklibra/cockpit,petervo/cockpit,petervo/cockpit,stefwalter/cockpit,martinpitt/cockpit,andreasn/cockpit,andreasn/cockpit,andreasn/cockpit,Scribery/cockpit,petervo/cockpit,larsu/cockpit,SotolitoLabs/cockpit,mareklibra/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,mvollmer/cockpit,martinpitt/cockpit,larskarlitski/cockpit,SotolitoLabs/cockpit,andreasn/cockpit,stefwalter/cockpit,mvollmer/cockpit,Scribery/cockpit,cockpit-project/cockpit,andreasn/cockpit,mareklibra/cockpit,martinpitt/cockpit,cockpit-project/cockpit,deryni/cockpit,petervo/cockpit,cockpituous/cockpit,deryni/cockpit,michalskrivanek/cockpit,SotolitoLabs/cockpit,michalskrivanek/cockpit,petervo/cockpit,mareklibra/cockpit,dperpeet/cockpit,harishanand95/cockpit,moraleslazaro/cockpit,Scribery/cockpit,harishanand95/cockpit,xhad/cockpit,larskarlitski/cockpit,larsu/cockpit,moraleslazaro/cockpit,garrett/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,larskarlitski/cockpit,garrett/cockpit,xhad/cockpit,larskarlitski/cockpit,cockpituous/cockpit,harishanand95/cockpit,xhad/cockpit,martinpitt/cockpit,dperpeet/cockpit,Scribery/cockpit,xhad/cockpit,mareklibra/cockpit,xhad/cockpit,harishanand95/cockpit,michalskrivanek/cockpit,michalskrivanek/cockpit,deryni/cockpit,larskarlitski/cockpit,SotolitoLabs/cockpit,harishanand95/cockpit,martinpitt/cockpit,larsu/cockpit,dperpeet/cockpit,harishanand95/cockpit,larsu/cockpit,deryni/cockpit