Intel N355 mini PC, 2x I226-V, UEFI/NVMe disko, systemd-boot. Only
2configs + retiolum + gg23 for now; NIC naming matches styx (et0 uplink,
int0 LAN). Retiolum card in retiolum/ (10.243.11.2), server tag.

update.sh: the hash probes ran under pipefail/errexit, so an expected hash-mismatch build produced an empty result and the script exited without touching the hashes.

Picks up the darwin tinc-up fix on lassulus/fixes: route the IPv4 prefix into
the utun. Without it macOS only installed a host route for the tunnel address
and every IPv4 packet for the mesh left through the default gateway. Same bug
kartei carried in its copy of the module (krebs/kartei#65); 28a957a6 switched
barnacle to tincr own module, which never had that fix.