Release 3.8.0.1: unify apphost, harden lifecycle and core SHA checks.

internal/coredl/download_test.go

@@ -0,0 +1,12 @@
+package coredl
+
+import "testing"
+
+func TestParseDigestAndVerify(t *testing.T) {
+	if got := parseDigestSHA256("sha256:AbC"); got != "abc" {
+		t.Fatalf("parse: %q", got)
+	}
+	if parseDigestSHA256("md5:x") != "" {
+		t.Fatal("expected empty for non-sha256")
+	}
+}