D69 — --first-nets routes named nets first and protects them

Decision

--first-nets routes the named nets first, again after every restart, and neither negotiation nor the via clean-up rips them for other nets

Alternatives

Length limits per net; a crystal corridor from the component rules

Reason

The simplest control that fixed the case (crystal 25.7 → 4.3 / 5.1 mm); the catalogue (doc 15) detects crystals and could fill the list