systemd owns its package; systemd-networkd configures networkd and claims none

The service manager's package was declared by the networking module, so the
module that is systemd could not own it and had to leave it out. networkd is a
component of systemd: its module configures it. Removing the package resource
from systemd-networkd uninstalls nothing — the host never removes a package
that is not declared absent.

modules/systemd/test/client.test.ts

@@ -156,9 +156,12 @@ test("a unit's name is never an option", async () => {
   assert.deepEqual(calls[0].args.slice(-2), ["--", "-x*"]);
 });
 
-test("the manifest declares no package — the service manager is always there, and networkd declares it too", () => {
+test("the manifest owns the systemd package — the service manager's own, never a component module's", () => {
   const m = JSON.parse(readFileSync(new URL("../module.json", import.meta.url), "utf8"));
-  assert.ok(!(m.resources ?? []).some((r: { type: string }) => r.type === "package"));
-  assert.ok(!m.capabilities.includes("package-manager"));
+  assert.ok((m.resources ?? []).some((r: { type: string; package?: string }) => r.type === "package" && r.package === "systemd"));
+  assert.ok(m.capabilities.includes("package-manager"));
+  // networkd is a component of systemd and configures it; it never claims the package.
+  const networkd = JSON.parse(readFileSync(new URL("../../systemd-networkd/module.json", import.meta.url), "utf8"));
+  assert.ok(!(networkd.resources ?? []).some((r: { type: string; package?: string }) => r.type === "package" && r.package === "systemd"));
   assert.deepEqual(m.claims[0].serves, ["units", "status", "start", "stop", "restart", "enable", "disable", "journal"]);
 });