plymouth-quit-wait.service is a synchronization point that
other services tie into, so they know when boot is finished
and the splash is down.
Unfortunately, in cases where the boot stalls, the last thing
users see is:
Starting Wait for Plymouth Boot Screen to Quit...
and then assume the problem is with the boot splash.
This commit makes the description less finger-pointy.
[Unit]
-Description=Wait for Plymouth Boot Screen to Quit
+Description=Hold until boot process finishes up
After=rc-local.service plymouth-start.service systemd-user-sessions.service
[Service]