As part of work to iteratively build section codeowners I did
development work behind a feature flag sectional_codeowners which can
be removed now that sectional codeowner processing has aligned with the
legacy processing - feeding a sectional or legacy formatted file through
either the legacy or sectional processing routines will return the same
data (the only difference being that sectional data through the
sectional parser will add to the Entry object the section in which it
was found.)