CUPS backend shouldn't handle "connecting-to-device" state reason.
It shows "Printer '%s' may not be connected" for this state,
which is not true in almost all cases. Better is to use
"printer-state-message" which contains correct message (#622011).
(cherry picked from commit 998459afb7ae8be77c138a879d82765785f3f54e)
c1c3670711