Review round 1. flysim reads FLY_FEED_VIA case-insensitively, so check 2 must
too: with Bus in fly.env it read flysim's zeroed counters and would have
escalated to restarting flystage and flycast every pass. It now lowercases.
05-deploy.sh runs the value through feed_via_normalize (lib/common.sh) and
dies on anything but direct|bus, writing the lowercased word, so a typo is a
deploy refusal instead of a flysim boot loop.
lint's fly.target check read only the first physical Wants=/Requires= line;
target_pulls joins backslash continuations and drops comments, with a
fixture that names a unit only on a continuation line. The cpuset loop writes
a flyedge drop-in on the page CPUs, and lint holds it.
