$ vikingctrl --help
[...]
  -maxSyncRetries uint
    	maximum number of retires for cluster synchronizations
    	that fail due to recoverable errors, or because
    	necessary information is missing. 0 for unlimited
    	retries (default 0)
[...]

IOW set a maximum number of re-queues for SyncIncomplete and
SyncRecoverable type failures. By default unlimited.

While here, update some missing function parameter docs.