Decreate large thread stack size to 64MB and create thread without large stack size if creation with large size fails
Decreate large thread stack size to 64MB and create thread without large stack size if creation with large size fails

uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend