licenses: add Reticulum License (#535222)

lib/licenses/licenses.nix

@@ -1323,6 +1323,17 @@ lib.mapAttrs mkLicense (
       fullName = "Qwt exception 1.0";
     };
 
+    reticulum = {
+      # The Reticulum License restricts certain fields of use, notably systems
+      # intended to harm human beings and AI/ML training datasets. Such usage
+      # restrictions are incompatible with the Open Source Definition
+      # (https://opensource.org/osd), in particular "No Discrimination Against
+      # Fields of Endeavor".
+      free = false;
+      fullName = "Reticulum License";
+      url = "https://reticulum.network/license";
+    };
+
     ruby = {
       spdxId = "Ruby";
       fullName = "Ruby License";

pkgs/development/python-modules/lxmf/default.nix

@@ -46,9 +46,7 @@ buildPythonPackage (finalAttrs: {
     description = "Lightweight Extensible Message Format for Reticulum";
     homepage = "https://github.com/markqvist/lxmf";
     changelog = "https://github.com/markqvist/LXMF/releases/tag/${finalAttrs.src.tag}";
-    # Reticulum License
-    # https://github.com/markqvist/LXMF/blob/master/LICENSE
-    license = lib.licenses.unfree;
+    license = lib.licenses.reticulum;
     maintainers = with lib.maintainers; [
       drupol
       fab

pkgs/development/python-modules/rns/default.nix

@@ -49,9 +49,7 @@ buildPythonPackage (finalAttrs: {
     description = "Cryptography-based networking stack for wide-area networks";
     homepage = "https://reticulum.network";
     changelog = "https://github.com/markqvist/Reticulum/blob/${finalAttrs.version}/Changelog.md";
-    # Reticulum License
-    # https://github.com/markqvist/Reticulum/blob/master/LICENSE
-    license = lib.licenses.unfree;
+    license = lib.licenses.reticulum;
     maintainers = with lib.maintainers; [
       drupol
       fab