Implement check_curl for http2 support
Please implement check_curl as an alternative to check_http as this is the successor and does support http2 and some other features.
The plugin is included in the 2.0/2.1 used monitoring-plugins 2.3.0, but not shipped with checkmk. Please ship with checkmk and build a Setup config screen for it.
See also https://forum.checkmk.com/t/check-http2-support/29837