These tasks are meant to run nightly on the master branch. Currently,
the external dns, http and dhcp Spicy analyzers are installed via zkg
post building. The build artifact is uploaded to Cirrus and the benchmarker
API triggered.
For the spicy_head task, the auxil/spicy submodule is pulled to the latest
commit. This also provides a bit of a nightly integration test.
There's something going on with the image cache on Cirrus where the images
are sometimes vanishing from the cache, thus causing builds to fail
because it can't load them. This forces a rebuild of all of the images,
thus refreshing the cached version of all of them.
