SNClient

Changes:

- add check_ntp_offset
- add check_mailq
- add check_connections
- improve check_process output
- add check_process cpu metrics
- improve check_service linux performance
- add reload support for systemd service
- add metrics to check_os_version
- add metrics to check_snclient_version
- use state from metric checks for final result
- check_service: adjust default warn/crit condition if service argument is used (#72)
- fix using arguments in aliased checks (#69)
- fix metrics order when using check_nsc_web
- fix wrong path in logrotation on linux
- fix check_drivesize using percent thresholds

Changes:

- improve counter memory consumption
- change internal wmi library
- fix check_temperature default thresholds
- fix check_kernel_stats listing processes and threads
- fix wmi based checks memory usage
- fix check_eventlog memory usage

Changes:

- check_service (linux): add rss/vms/cpu/task metric and remove generic mem metric
- check_service: add more metrics
- add cli inventory mode
- add duration / age / date / human number macro post processors
- add support for %{} macros and $() as well
- add timeout to check_drivesize for hanging mounts
- add check_cpu_utilization
- add check_mount
- add check_temperature
- add check_kernel_stats
- add fmt macro operator to formt numbers
- add automatic retries to wmi querys
- add /api/v1/admin/reload rest endpoint to initialize config changes
- add /api/v1/admin/certs/replace rest endpoint to replace certificates
- support different allowed hosts settings for each web handler
- fix cpu check on osx not returning metrics