Where relevant means the highest verbosity when fields are filtered with
-f on the command line. There is still a caveat that this only applies
for the first iteration, and some parameters may conditionally appear
and not be visible when that event occurs (for example, when the child
process starts).

The rebuild variable was used as a bitmap but did not make use of
individual bits. This is now the case, but only for the two actionable
rebuild conditions.

Closes #2990