### R263-a: ClearBackupTarget writes true
1700:		s.StoragePaths[i].BackupTarget = true
--- FAIL: TestR263_OnlySetBackupTargetGrantsTheRole (0.24s)
    r263_backup_target_writers_test.go:73: BackupTarget may be granted outside SetBackupTarget at: [../settings/settings.go:1700:3]
FAIL
### R263-b: a composite literal BackupTarget: true in another package
--- FAIL: TestR263_OnlySetBackupTargetGrantsTheRole (0.28s)
    r263_backup_target_writers_test.go:73: BackupTarget may be granted outside SetBackupTarget at: [../web/zz_r263_decoy.go:5:50]
FAIL
