Completes dba54b2 (which staged deletions only — pathspec'd add missed
the content edits). Layout table, Key Scripts, DNS discipline, conman
section now point at KNEL/netinfra|facilities|perf|monitoring|inventory;
conman example switched from IP literal to pfv-tsys4 (DNS-names rule).
https://projects.knownelement.com/issues/769#note-4152