merge.
- Sort all of the existing options and re-indent per Tidy standards. This is
simply for cosmetic effect.
- Allow the iterator to return all options again, even "internal" options.
Things are too embedded with N_TIDY_OPTIONS, etc., to try to hide them.
- Instead, simply add documentation to LibTidy users that they shouldn't use
internal options.
- Also added `TidyInternalCategory` to `TidyConfigCategory` without adding a
new field to the struct. API users should check for this category before
use.
- Defined a two character macro for `TidyInternalCategory` for use in
`option_defs[]`.
- Changed struct `option_defs[]` to reflect the new category for affected
options.
- Removed string indicating * refers to internal options, since it no longer
applies.
- Regen'd all strings for previous point.
- `tidy.c` now checks for `TidyInternalCategory` everywhere in order to
suppress output.