Check_MK Werk 8664: prefer ucd_mem over hr_mem in case of pfSense monitoring

ID: 8664 Title: prefer ucd_mem over hr_mem in case of pfSense monitoring Component: Checks & agents Level: 1 Class: Bug fix Version: 1.5.0i1 If monitoring pfSense firewalls the hr_mem check does not provide the right data. Because of this ucd_mem is preferred here. The change is incompatible because you have to rediscover the affected hosts so ucd_mem is used instead of hr_mem.