sms_cart_region_detect returns REGION_USA for any cartridge outside its
CRC list whose header is not Japanese, so Genesis Plus GX and its two
forks open bios_U.sms for Australian and Brazilian cartridges as well.
Tagged north-america and europe only, --region australia,japan dropped
it from the pack. The tag now adds latin-america and oceania.
Profiles that read two repositories, a libretro port and its upstream,
now prefix each citation with source or upstream, decided by which tree
carries the cited value at its pin. The emulator pages use the word to
tell libretro glue, emulator code as the port carries it, and the
upstream emulator apart.
Region tags must name the territory the code selects a file for. Each
entry tagged europe alone was read at its pin: PAL branches Australian
media reach now include oceania, and tags that follow a video standard,
a user setting or a hardcoded value are removed.