In this case, it's our fault, not sambas.
Essentially, FreeMiNT only supports a maximum of 32 file handles. And samba reserves 20
for it's own internal use with the tdb files. That leaves us 12. Reduce that by the traditional
stdin/stdout/stderr, and we're left with 9. Not very many by todays standards.
I've got some in-progress patches to bump that to 128. Although we could go higher later.