this comes with a recursion rewrite and simplification; it works
a bit more intuitively, now, but i still haven't figured out what
caused the bug that led me down this rabbit hole.
in any event, Alias now rules the roost when it comes to recursion,
which means it's a bit poorly named, but also means that there
won't (shouldn't) be multiple accidental runs for one output, caused
by multiple modules doing the recursion (despite only one really
having a legitimate reason to) --- a classic case of the intended
use of recursion (including the comment to only recurse when you
*know* the input is for you) being lost and forgotten with time
this also obsoletes meta.skip_recursion_scan. between this commit
and the last, people would be wise to revise their config files
Brian S. Stephan
1fe9575502