2016-08-01: initial release
2017-06-17: added last update check
2017-01-03: fixed inventory function for bad ino data
2017-01-03: fixed lastupdate check
2018-03-08: fixed update status,  changed snmp scan function and inventory
2018-03-15: code cleanup
2020-06-07: code cleanup
2020-06-08: changed snmp-scan function
2021-04-29: added option to adjust version string time format
2021-08-23: rewritten for CMK 2.0
2022-11-30: WATO: fixed CheckParameterRulespecWithoutItem (from CheckParameterRulespecWithItem)
2023-05-29: moved gui files to ~/local/lib/check_mk/gui/plugins/...