Notify critical failure if unable to rename journal
Notify critical failure if unable to rename journal

- Reverted check for invalid handle
- Added 'buld.Critical()' if rename fails after 5 attempts
ericflo/Sia,mharkus/Sia,NebulousLabs/Sia,NebulousLabs/Sia,ericflo/Sia,mtlynch/Sia,mtlynch/Sia,mharkus/Sia