medium: parse: Clean up the CLI syntax display
* Don't show quotes when not necessary
* Allow a new syntax for $id nvpairs: Instead of

  node foo $id="1"

display as

  node 1: foo
doc: Update documentation with cleaned up CLI syntax
medium: cliformat: Nicer display for ( a b sequential=true ) sets
Instead of parsing a two-element sequential set into

    _rsc_set A B

display it as

    ( A B sequential=true )

..since the first form is undocumented and confusing.
dev: cibconfig: Simplify construction of backtrans
dev: cibconfig: Clean up == vs is/is not