Fix typos so that the variable names match.
Added a check_period parameter and redering of it in the host object ERB template; removed it from the lists of needed parameters.
Added a check_interval parameter and redering of it in the host object ERB template; removed it from the lists of needed parameters.
Added a retry_interval parameter and redering of it in the host object ERB template; removed it from the lists of needed parameters.
Removed quotes because the max_check_attempts, check_interval and retry_interval values aren't supposed to be quoted.
Added a header for the exported resources section.
Added a section explaining what happens with undef values.
Added an enable_notifications parameter and redering of it in the host object ERB template; removed it from the lists of needed parameters.
Added an enable_active_checks parameter and redering of it in the host object ERB template; removed it from the lists of needed parameters.
Added an enable_passive_checks parameter and redering of it in the host object ERB template; removed it from the lists of needed parameters.
Added an enable_event_handler parameter and redering of it in the host object ERB template; removed it from the lists of needed parameters.
Added an enable_flap_detection parameter and redering of it in the host object ERB template; removed it from the lists of needed parameters.