Marks it as deprecated in lull with a comment, and removes the verbosity
toggle state from dill. Filtering should now happen at the edges where
%crud error messages get printed.
We don't remove it from lull just yet, because that would necessitate a
kelvin bump, even though the rest of this changeset doesn't.
These haven't been in use for a long time (if ever), but are now fully
deprecated: if you want to receive system output, see dill's %logs task
instead.
Now that %logs exists, dill can delegate responsibility for printing
system output to outsiders (like the runtime, or the terminal handler
agent). Here, we remove dill's printing logic, which was still coupling
it to the default session and drum's expected semantics.
A dill %logs task can be used to open and close subscriptions to "system
output". Whenever dill receives a %text, %talk, or %crud task, it
considers this "system output", and passes it along to all %logs
subscribers.
This removes the logic from cleaning up stale subscriptions in %gall,
leaving +ap-rake as it was, and moves it to the +on-kroc arm in %ames.
Failed subscriptions from nacking a %watch plea that were
not properly corked (fixed in https://github.com/urbit/urbit/pull/6102)
are a subset of the more general "stale re-subscription" issue, so
we take care of all stale flows at the same time, by focusing on the
current subscription—leaving all others to be corked automatically—and
checking if it received a nack, to subsequently cork it.
This modifies the %rake task in %gall, to select what kind of
subscriptions we try to close:
=mode %o: kill old pre-nonce subscriptions
=mode %z: kill old pre-nonce subscriptions, including sub-nonce = 0
=mode %r: kills all stale resubscription flows
It also adds a dry-run option to both tasks (%kroc in ames, %rake in gall)
