* tta/C/convert/converter.c (converter_format_data)
(setup_converter_format), tta/C/convert/converter.h
(CONVERTER_FORMAT_DATA), tta/C/convert/html_prepare_converter.c
(html_format_setup): add format_setup function reference in
CONVERTER_FORMAT_DATA and add setup_converter_format that calls
setup_converter_generic and the format specific format_setup to
initialize the converter format data.  Add converter_format argument
to html_format_setup.  Update callers.

* tta/C/texi2any.c (main): call setup_converter_format.