They came back as "unknown function break", which reads as a typo rather than
as a missing feature. plan.org's loop story is settled as imperative while/for
with break, continue and return, so these are named, planned and absent - and
they alter control flow, which is the first thing the house rule says must be
recognised explicitly rather than left to fall through to a call.
Found by the lane writing the documentation site, which had to describe the
loop forms and discovered two of them were neither implemented nor refused.