dsynth - Fleshout functions
* Add dynamic MaxWorker reduction based on the load. The number of
workers will be reduced by (load * 2 / ncpus) when the load
exceeds (ncpus * 2.0), with a floor of min(4, MaxWorkers).
The idea here is to reduce unnecessary swap use when building
larger packages that push the load up greatly.
* Clean-up terminal spam after ncurses has been turned on.
* Generate fatal error if required configured directories are
missing.
* Add -y (yes to all) option.
* Implement 'status' and 'status-everything'
* Implement 'purge-distfiles' (initial work)
* In scans that dump percentages, print 100% at the end before
moving onto the next step.
UnifiedSplitRaw
