Instead of saving the state locally in a variable during Plack lifetime,
we move the saved hash to the cache. We clear the key when we enter
smart-rules.pl. This makes a change in circ rules immediately effective.
Test plan:
Run the modified tests.
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
