Use GLIBC 2.34 compatible knockd for Java 17 images and older (#4158)

Dockerfile

@@ -12,6 +12,8 @@ ARG EXTRA_DEB_PACKAGES=""
 ARG EXTRA_DNF_PACKAGES=""
 ARG EXTRA_ALPINE_PACKAGES=""
 ARG FORCE_INSTALL_PACKAGES=1
+ARG KNOCKD_VERSION=0.8.1
+ARG KNOCKD_REPO_ORG=Opvolger/knock
 RUN --mount=target=/build,source=build \
     TARGET=${TARGETARCH}${TARGETVARIANT} \
     /build/run.sh install-packages