queue: infer source from the url if it's not in target config

models: another gross hack^W^Wclever heuristic to pick HgwebAdapter

docs: split entry points list with comments

docs: describe license

docs: describe entry points

candolint: add configuration file

viewer: show "unknown" in status badge when no checks have been done yet

queue: if there's no event header, set event to 'nonexistent'

tests: don't ignore exit code from pytest.main()

tests: test hook handlers in hooks-queue.py