siterender.arcade_board(sha1) names the board a set archive is the
BIOS of, from the profiles' bios_zip entries and their contents CRC32s,
never the folder. board_slug(id) gives the section slug. A board links
once the system pages call record_board_section(), so no page links a
section nobody wrote. Thirteen ids whose files sit in one program's
folder get a reviewed parent, mz800 the Sharp MZ section. The link
test counts set archives.
A reviewed SYSTEM_PARENTS table leads variants (WonderSwan Color, Neo Geo MVS, MSX2) to the section holding their files, an Arcade heading that reads the name exactly is accepted, and system_search_aliases() gives the platforms' native ids for search. 260 of 636 ids linked before, 338 after.