* rework into a json app and support the old style
* working now
* add health checking
* add some datapoints to make writing alerts easy
* add a few missing item for has checks
* rework the app page
* use the right var for id9
* print the self test log if we have it
* add a graph for the max temp
* display the max temp graph
* display the health pass in the disk list if we have the data
* fix legacy handling and set app as ok
* replace id190 and id194 with the more useful maxtemp graph on the apps page
* don't print the additional info area for legacy extends
* add id232
* add id252 graph support
* properly display id232 now
* do not display SSD graphs for non-SSD disks
* for legacy extends, make sure we don't have a bad line
* add missing label for Product value
* fix metrics
* rework the metrics stuff a bit more
* typo fix
* more smart metrics cleanup
* add exit info to metrics
* style cleanup and logic checking for when disks are all now fine
* fix checking for no more health errors
* update the docs for SMART for v1 and remove slightly pointless notes about useSN
* update the docs
* initial test stuff
* add missing tests for the legacy code
* save if it it is legacy or not
* style cleanup
* update the smart legacy test
* style cleanup
* more test tweaking
* some more style cleanup
* more test fixes
* correct the disk ID for the legacy test da0 -> Z304VCFY
* more tests update
* more test cleanup
* begin cleanup of the v1 tests
* more v1 test updates
* more tests for v1
* more test cleanup
* fix exit_nonzero and add unhealthy metric
* add smart alerts
* add the metric unhealthy to the stat test
* use app data for the smart-common.inc.php
