
This change fixes two major issues: 1. If you don't use SIGQUIT to stop Plex it will corrupt its own database :( 2. Newer versions of Plex keep metadata in the `com.plexapp.plugins.library.db` database. This is the file that we copy into `/var/lib/plex/.skeleton`. If we copy the empty database on top of this one the user will lose their entire library metadata. This change skips the copy if the file already exists.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.