Use salsa.debian.org URLs in Vcs-{Browser,Git} fields

Apply change to 868 packages, using:

  $ dht mass-change "Use salsa.debian.org URLs in Vcs-{Browser,Git} fields" 'sed -i -e "s,^Vcs-Git:.*$,Vcs-Git: https://salsa.debian.org/haskell-team/DHG_packages.git," -e "s,^Vcs-Browser:.*$,Vcs-Browser: https://salsa.debian.org/haskell-team/DHG_packages/tree/master/p/$(basename $(pwd))," debian/control' p/*