Checkmk Werk 10890: Add initial support for Proxmox environments

ID: 10890 Title: Add initial support for Proxmox environments Component: Checks & agents Level: 1 Class: New feature Version: 1.7.0i1 This werk adds very basic support for Proxmox installations. Currently only the version of the installation and the subscription status of each managed node is being returned by a special agent called 'agent_proxmox' and checked against by the provided check plugins 'proxmox_version' and 'proxmox_subscription'. The agent can be configured via a WATO rule, initial manpages are provided.