Release Jarl under the MIT License

LICENSE is installed with the docs, included in make dist, and becomes
the Debian package's copyright file together with the bundled Cinzel
font's OFL.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -24,6 +24,9 @@ The first version, to be released as 0.1.0.
   the web UI. Networks smaller than a /24 explain that they belong in the
   enclosing /24's zone.
 - docs/operations.md: setting up a secondary server with its own jarld.
+- Jarl is released under the MIT License (`LICENSE`), which is installed
+  with the docs and is the Debian package's `copyright` file (with the
+  bundled Cinzel font's OFL).
 - A Debian package: `make deb` builds `dist/jarl_<version>_<arch>.deb` with
   only `dpkg-deb` (no root), for the host or any other architecture
   (`DEB_ARCH=arm64`). Installing it creates the `jarl` user and directories

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 abrown38
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

@@ -82,6 +82,7 @@ install-files:
 	install -D -m 0644 deploy/sysusers.d/jarl.conf $(DESTDIR)$(SYSUSERSDIR)/jarl.conf
 	install -D -m 0644 deploy/tmpfiles.d/jarl.conf $(DESTDIR)$(TMPFILESDIR)/jarl.conf
 	install -D -m 0644 README.md $(DESTDIR)$(DOCDIR)/README.md
+	install -D -m 0644 LICENSE $(DESTDIR)$(DOCDIR)/LICENSE
 	install -D -m 0644 CHANGELOG.md $(DESTDIR)$(DOCDIR)/CHANGELOG.md
 	install -d $(DESTDIR)$(DOCDIR)/docs $(DESTDIR)$(DOCDIR)/contrib/acme.sh $(DESTDIR)$(DOCDIR)/contrib/lego
 	install -m 0644 docs/*.md $(DESTDIR)$(DOCDIR)/docs/
@@ -105,7 +106,7 @@ dist: build
 	for arch in amd64 arm64; do \
 		GOOS=linux GOARCH=$$arch go build $(GOFLAGS) -ldflags '$(LDFLAGS)' -o dist/jarl-$(VERSION)-linux-$$arch/jarld ./cmd/jarld && \
 		GOOS=linux GOARCH=$$arch go build $(GOFLAGS) -ldflags '$(LDFLAGS)' -o dist/jarl-$(VERSION)-linux-$$arch/jarl ./cmd/jarl && \
-		cp -r README.md CHANGELOG.md docs deploy contrib bin/completion dist/jarl-$(VERSION)-linux-$$arch/ && \
+		cp -r README.md CHANGELOG.md LICENSE docs deploy contrib bin/completion dist/jarl-$(VERSION)-linux-$$arch/ && \
 		tar -C dist -czf dist/jarl-$(VERSION)-linux-$$arch.tar.gz jarl-$(VERSION)-linux-$$arch || exit 1; \
 	done
 

README.md

@@ -143,6 +143,11 @@ Version 0.1.0, the first release. It is feature-complete for one server's
 configuration. DNSSEC signing and managing several servers are not handled
 yet ([concepts.md](docs/concepts.md#what-jarl-deliberately-doesnt-do-yet)).
 
+## License
+
+Jarl is released under the [MIT License](LICENSE). The bundled Cinzel font
+is under the SIL Open Font License 1.1 (below).
+
 ## Credits
 
 The "Jarl" name in the web UI's header uses [Cinzel](https://github.com/NDISCOVER/Cinzel) Bold

scripts/mkdeb.sh

@@ -58,6 +58,24 @@ GOOS=linux GOARCH=$goarch GOARM=$goarm CGO_ENABLED=0 go build -ldflags "$LDFLAGS
 make --no-print-directory install-files DESTDIR="$root" PREFIX=/usr \
 	UNITDIR=/usr/lib/systemd/system JARLD_BIN="$work/jarld" JARL_BIN="$work/jarl" >/dev/null
 
+# Debian's machine-readable copyright file, from LICENSE and the bundled
+# font's licence (the font is embedded in jarld's web UI).
+indent() { sed -e 's/^$/./' -e 's/^/ /' "$1"; }
+{
+	echo "Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/"
+	echo "Upstream-Name: jarl"
+	echo
+	echo "Files: *"
+	echo "Copyright: $(sed -n 's/^Copyright (c) //p' LICENSE)"
+	echo "License: Expat"
+	indent LICENSE
+	echo
+	echo "Files: internal/web/static/assets/fonts/*"
+	echo "Copyright: 2020 The Cinzel Project Authors"
+	echo "License: OFL-1.1"
+	indent internal/web/static/assets/fonts/Cinzel-OFL.txt
+} > "$root/usr/share/doc/jarl/copyright"
+
 for f in postinst prerm postrm; do
 	install -m 0755 "deploy/debian/$f" "$root/DEBIAN/$f"
 done