2017-12-28: initial release
2018-01-10: added handling for tunnel not found
2018-01-23: removed unnecessary counters
2018-02-15: removed ipsec tunnel status, changed ike ipv4 check
2018-02-16: readded tunnel alias
2018-07-11: added parameter for missing IPSec SA, changed 'parsed' to use peer ip as index
2021-08-03: rewritten for CMK 2.0