The installer served by install.mulgadc.com is the latest release's, so it
predates the --channel flag the harness was passing and would have died with an
unknown option. Document the same form in both install guides.
Both install guides had grown sections that were not install steps, which is what made the multi-node one hard to follow. Each now ends on a step that hands off to Setting Up Your Cluster, and the reference material moves under Administration where it can be read on its own.
- Single-node and multi-node both end on a "Set Up Your Cluster" step rather than a trailing sentence.
- The multi-node cluster-state check via `spx admin kv digest` is gone. Verification is now every node Ready, capacity pooled, and the AWS API answering.
- "How Multi-Node Storage Works" becomes docs/admin/predastore-distributed-storage, expanded with the host and node model, the write and read paths, degraded writes, hinted handoff, repair, encryption at rest, and what each class of failure costs.
- "Firewall and Cluster Membership" becomes docs/admin/host-firewall, expanded with the full public, cluster and encap port groups, how to narrow SSH, and which files under /etc/spinifex/firewall survive an upgrade.
- Setting Up Your Cluster gains a closing step that arms the firewall and narrows SSH, so the securing work lands after a cluster that works rather than during the install.
install-usb and vpc-networking followed the two moved sections to their new paths.
* docs: bring doc titles and descriptions into SEO length limits
Rewrite the frontmatter title and description of every published doc so the
rendered <title> lands in 50-60 characters (including the site suffix) and the
meta description lands in 150-160 characters.
* docs: move SEO titles to a seoTitle field and restore display titles
The frontmatter title renders as the page H1 and the sidebar label, so tuning it
for the title tag shortened nothing and lengthened the visible navigation. Put
the search-facing string in seoTitle and give title back its original value.
Ben Duncan