busybox-initscripts: add ttyUSB[0-9] to dialout group
Add /dev/ttyUSB[0-9] to dialout group in /etc/mdev.conf, so normal
users can use attached devices in programs like ‘screen’, ‘minicom’ etc.
without need for su or sudo. One line patch is posted at the next url:
(from redmine: issue id 9778, created on 2018-12-20, closed on 2019-01-10)