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Enables or disables the logging of reCAPTCHA test results into the audit log. Should be enabled only temporarily during debugging of problems with sending of packages, because it may create a lot of log entries.
The whole settings screen looks like this:
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Enable repeated password guessing protection
If enabled, then in case of incorrect login attempts it will exponentially increase the time before allowing next login attempt. Up to the maximum time of 10 minutes between attempts.
If disabled, then there is no limit on login attempts. Therefore it should be always enabled for production use, otherwise the user accounts are open to rapid automated password guessing and possible account theft.
It is enabled by default.