check-synology-plugins

Changelog

• added IPv6 support to all plugins (https://github.com/m-erhardt/check-synology-plugins/pull/5) (thanks to @peteeckel for contributing this feature)
• Added featue to ignore thresholds for certain volumes to check_synology_volumes.py (https://github.com/m-erhardt/check-synology-plugins/pull/7) (thanks to @peteeckel for contributing this feature)
• Refactored check_synology_volumes.py (https://github.com/m-erhardt/check-synology-plugins/pull/8)