Host configuration - not optional

``` <key>NSLocationWhenInUseUsageDescription</key> <string>Records your route while you are using the app.</string> <key>NSLocationAlwaysAndWhenInUseUsageDescription</key> <string>Records your route in the background so your trips are complete even when the app is closed.</string> <key>NSMotionUsageDescription</key> <string>Detects when you start and stop moving, to save battery.</string>

<key>UIBackgroundModes</key> <array> <string>location</string> <string>processing</string> </array>

<key>BGTaskSchedulerPermittedIdentifiers</key> <array> <string>com.devstree.trackit.backstop</string> <string>com.devstree.trackit.sync</string> </array> ```

The identifiers must appear verbatim. A mismatch is not a degraded backstop - it is an exception at registration.