In 1, there is no documentation about the following configuration variables (there are comments in the code in 2):

• MasterFailoverDetachSlaveMasterHost
• MasterFailoverLostInstancesDowntimeMinutes
• PostponeSlaveRecoveryOnLagMinutes

Note that the options above are in sample conf file 3.

I will submit a PR once a question related to MasterFailoverDetachSlaveMasterHost is answered in a private Slack.