Rewrite Licensing for PolyForm Noncommercial; drop the free-tier model
The wiki described the old open-core model -- MIT source, a 100-lease free
tier, a 7-day grace period, and a write lock afterwards. All of that is gone
as of ez-kea 9b72f93, so every claim on this page was false.
Licensing.md is rewritten around the actual terms: PolyForm Noncommercial
1.0.0, free and unlimited for noncommercial use (including charities, schools,
and government bodies, which is the license's own wording), commercial use by
paid license. Adds an explicit "Nothing is ever blocked" section, since the
previous model is what readers may remember, and explains why enforcement was
dropped rather than leaving it unexplained.
Also corrected: license keys no longer encode a maximum lease count, expired
keys are no longer described as reverting to a limited free tier, EZ-Kea is
described as source-available rather than open source, and PRs are noted as
not accepted.
Home.md loses the "banner, then grace period, then blocked" quick answer in
favour of what's actually true, and gains an "Is it free?" entry. Sidebar
gains a one-line licensing footer.
Add full documentation: installation, deployment scenarios, configuration reference, security hardening, HA, testbed, licensing