SNClient

Changes:

- support += operator in config files
- create logfile folder unless it exists
- update windows exporter to 0.25.1
   - i386 still uses 0.24 since thats the last supported version
- fix check_process username being empty sometimes
- fix check_cpu_utilization calculation
- fix automatic log rotation on windows

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