* default svn URL to 127.0.0.1 for subversion integration tests * svn client gives up before trying IPv4 addresses when localhost->(::1,127.0.0.1) in dual-stack envs (eg podman, most real hosts) * svn client also requires legacy CN match on cert * IPv6 works, but setup playbook would need a bunch more templating exceptions to conditionally manage `[::1]` * explain IPv4 defaults