Nagios Autodiscovery (#4751)
Nagios Autodiscovery (#4751)

* adding nagios AD configuration

* wording update

DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core