Debian Buster: Plex user not added to "render" group during install which is needed for HW transcode

[pl_5309]

It is already part of the new installer that is waiting for release.

New Linux installer - Forum preview & beta testing

New Plex Media Server packaging (installer) for Linux. We set out on this task to upgrade PMS’ packaging for all Linux systems. A. The design criteria Intelligent installer in the package itself. a. Non-destructive pre-installation evaluation. b. Not changing a running installation unless the installer knows it will succeed. c. Capable of evaluating each system’s particular configuration and adapting to it. d. Reporting errors as they are found in the Pre-installation and actual i…