CLSA-2026-1778858907 mod_proxy_cluster: Fix of 2 CVEs

CVE-2023-6710: stored XSS in modcluster-manager HTML output via virtual host and context names rendered without HTML escaping - CVE-2024-10306: unauthorized MCMP requests due to directive being ignored for protocol-handler filtering; runtime guard now refuses siblings of EnableMCPMReceive, and...