This is both to remind the user that crash reports are automatically submitted and to make it easy for them to point us to a specific crash, as notification center will now work as a list of recent crashes; click on one of them to see the online version.
According to the documentation, sharedAddressBook should return nil when user hasn’t granted access, but one user is reporting random crashes related to this code.
We now explicitly disable it for targets that hasn’t yet been upgraded to ARC. This way, it’s easier to get an overview of which targets hasn’t yet been upgraded and ensures new targets has ARC enabled.
