RetroPie writes MAME's mame.ini with samplepath $romdir/mame/samples;
$romdir/arcade/samples and artpath the same way (scriptmodules/emulators/
mame.sh:135-136), and MAME4ALL's mame.cfg with rompath and samplepath
below $romdir (mame4all.sh:78-79). The extractor kept the lines naming
$biosdir only. An iniSet whose value lists folders below $romdir is now a
search path, one folder alone being where the program writes
(cfg_directory and the others). $romdir is read as RetroPie's roms root
(retropie_packages.sh:47-49).
Rescraped at the pinned revision 427e7621: the four records are the only
change.
Manifests: RetroPie's standalone MAME reads bbc.zip in roms/mame/samples,
no longer named as read outside the BIOS folder, and its 19 floppy
samples there.