[BRLTTY] Permission errors on Linux with HID devices

[Dave Mielke]

[quoted lines by Justin Pospical on 2022/07/30 at 12:25 -0700]

>Using brltty 6.5 on Arch, brltty logs "permission denied" errors when attempting to connect to my HID display (APH Chameleon 20). This seems to happen even when run directly as root, without brltty dropping privileges. The devices in question (/dev/hidraw0 and /dev/hidraw1) are present and readable by root. 

They also need to be writable.

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