Import december-2020-12-18 from private repo (scrubbed 2026-05-27)

Targets Rec Room 2020.12.18 client.

Re-import after adding:
- DorkNet.ClientMod/dorknet-clientmod.json.template — config schema
  the launcher's manifest-driven patcher renders into UserData/.
- tools/build-patcher-zip.ps1 — produces the dorknet-clientpatch-{key}.zip
  Release asset the launcher fetches.
- .github/workflows/release.yml — auto-publishes both Release assets
  on v1-december-* tag push.

Scrubbed via maintainer-side scrub-for-public.ps1: same drop rules as
the prior import, plus build-patcher-zip.ps1 added to the tools/
allow-list so it survives the scrub.

NOTICE

@@ -0,0 +1,39 @@
+DorkNet — Rec Room Private Server
+Copyright (C) 2026 Alexa <https://github.com/Alexa-RR/Dorknet>
+
+This program is free software: you can redistribute it and/or modify it
+under the terms of the GNU Affero General Public License as published
+by the Free Software Foundation, version 3 of the License.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public
+License along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+────────────────────────────────────────────────────────────────────────
+Attribution requirement
+────────────────────────────────────────────────────────────────────────
+
+If you fork, modify, host, or otherwise redistribute DorkNet — including
+running a publicly-accessible instance accessed over a network as
+covered by AGPL §13 — you must:
+
+  1. Make your full source code (including any modifications) available
+     to all users who interact with the running instance, under the
+     same AGPL-3.0 license.
+
+  2. Preserve this NOTICE file in your distribution.
+
+  3. Credit the upstream project visibly. At minimum:
+       "Based on DorkNet (https://github.com/Alexa-RR/Dorknet) by Alexa,
+        licensed AGPL-3.0."
+     Acceptable placements: README, server console banner, in-game
+     credits screen, or web-facing footer of any deployment dashboard.
+
+  4. Indicate in your repository / release notes which substantive
+     changes you have made relative to the upstream version.
+
+The full text of the AGPL-3.0 license is in LICENSE.