This is done to be more consistent with future field naming conventions,
and to make automatic generation of lenses simpler. See discussion in
\#1545.
rsOpts -> _rsReportOpts
rsToday -> _rsDay
rsQuery -> _rsQuery
rsQueryOpts -> _rsQueryOpts
These Ledger-ish spellings were dropped over the years, to improve
--help's layout. Now they work again, but are considered hidden flags
so --help doesn't show them automatically (but I decided to mention
them manually in --date2's description).
This means committing a bunch more generated files, but it's probably
worthwhile, so we can have both rich hyperlinked/styled command docs
and clean readable command help.
