Format the worker_id (w_num) nicely.
Everything.
Rename 'fallback' as 'spillway' since 'spill' is the new term.
Add the disk errors to the status.
Actually allow --sec=N to override --forever.
clang flags for address sanitizer.
Verbosity plus killall the right binary.
TODO for threadsanitizer finding in shutdown path.
Do not length() on potentially undef.