Add support for custom logging output control via properties.
When debugging, it's better if AL outputs low watermark as hex.
Lower grace period for recovery progress - too long leaves massive windows.
Allow AL to serve a NEED in recovery.
Fix warning in AL to output correct AL identity.
Revise AL logging levels downwards as appropriate for production use.
Revise Common logging levels downwards as appropriate for production use.
Revise Core logging levels downwards as appropriate for production use.
Revise Leader logging levels downwards as appropriate for production use.
Revise LeaderFactory logging levels downwards as appropriate for production use.
Revise LogRangeProducer logging levels downwards as appropriate for production use.
Allow selective installation of failure detector so that LongTerm test client doesn't receive erroneous recovery requests.