man_parse_section
static void man_parse_section(enum man_sec, const struct roff_node *, mandb_rec *);
man_parse_section(mapping[i].section, n, rec);
man_parse_section(MANSEC_RETURN_VALUES, n, rec);
man_parse_section(MANSEC_EXIT_STATUS, n, rec);
man_parse_section(MANSEC_NONE, n, rec);