[BRLTTY] Baum filtering still too open?

[Samuel Thibault]

Hello,

For the NLS eReader Zoomax, we can see in udev:

ENV{PRODUCT}=="1a86/7523/*", ATTRS{idVendor}=="1a40", ATTRS{idProduct}=="0101", ENV{BRLTTY_BRAILLE_DRIVER}="bm", GOTO="brltty_usb_run"

In https://bugs.launchpad.net/ubuntu/+source/brltty/+bug/1958224/comments/46
Alessandro Astone is surprised that ENV{PRODUCT} could be different
from ATTRS{idVendor} and ATTRS{idProduct}. My guess is that we are here
matching the usb device and the usb hub on which it is connected. But
the vendor/product ids don't really seem specific to Baum? One could
very well plug a QinHeng Electronics HL-340 USB-Serial adapter
(1a86/7523) on a Terminus Technology Inc. 4-Port HUB (1a40/0101).

Samuel