lintian-tests: only test sid on git commits, and only if that job succeeds, trigger the lintian test on jessie and if that succeeds, trigger it on wheezy.
remove workaround: don't keep (all) screenshots on hurd installs
add rebootstrap.yaml from Helmut Grohne (Closes: 743697 eventually)
fixup rebootstrap job configuration
add m68k rebootstrap job. the redundancy in job-cfg/ is really unbearable ;)
[hurd] Temporarily switch to text install.