Code review comment for ~slyon/britney/+git/hints-ubuntu:slyon/dgit-vs-devscripts

The failure in "downstream-gitless" is resolved when using a proper proxy environment:

$ sudo autopkgtest dgit -U --apt-pocket=proposed=src:dgit --test-name=downstream-gitless --env "http_proxy=http://squid.internal:3128" --env "https_proxy=http://squid.internal:3128" --env "no_proxy=127.0.0.1,127.0.1.1,localhost,localdomain,novalocal,internal,archive.ubuntu.com,security.ubuntu.com,ddebs.ubuntu.com,ppa.launchpad.net,ports.ubuntu.com" -- lxd autopkgtest/ubuntu/lunar/arm64
[...]
autopkgtest [16:49:02]: @@@@@@@@@@@@@@@@@@@@ summary
dpkgsourceignores-docs SKIP unknown restriction x-dgit-intree-only
defdistro-dsd-clone-drs SKIP unknown restriction x-dgit-git-only
dsd-clone-drs SKIP unknown restriction x-dgit-git-only
hint-testsuite-triggers SKIP unknown restriction hint-testsuite-triggers
build-modes-sbuild SKIP unknown restriction x-dgit-schroot-build
quilt-gbp-build-modes-sbuild SKIP unknown restriction x-dgit-schroot-build
sbuild-gitish SKIP unknown restriction x-dgit-schroot-build
i18n-po4a-uptodate SKIP unknown restriction x-dgit-git-only
package-build SKIP unknown restriction x-dgit-git-only
spelling SKIP unknown restriction x-dgit-git-only
downstream-gitless PASS