"Paused" state not persisted

[andreaskem]

Describe the bug
This bug was encountered using lprint but I was sent here to report the actual issue:
When pausing a printer (or its associated queue), its state is not persisted across service restarts.

To Reproduce

$ lprint pause -d lpne3
$ lprint status -d lpne3
Running, stopped since Thu, 31 Aug 2023 05:47:00 GMTpaused.
$ sudo systemctl restart lprint
$ lprint status -d lpne3
Running, idle since Thu, 31 Aug 2023 05:48:29 GMT.

Expected behavior
A paused printer should not be restarted by a reboot or service restart. For example, a printer might suddenly start printing many jobs after a system reboot.

System Information:

• OS: Linux (Arch Linux)
• pappl 1.3.2
• cups 2.4.6
• lprint 1.2.0

Additional context
Pausing a printer does not seem to have an effect on /etc/lprint.conf, where I assume its state should be persisted.

[michaelrsweet]

[master caca78c] When multiple queues are supported, preserve the paused state of each printer (Issue #286)