Increase recommended number of confirmations from 3 to 6.
also revert the 'clock display' back to 6 confirms
Merge pull request #2 from patricklodder/1.7.2-dev-confirms

also revert the 'clock display' back to 6 confirms
Merge pull request #527 from rnicoll/1.7.2-dev-confirm

Increase recommended number of confirmations from 3 to 6