v0.22.0 several enhancements and fixes for security, network, doc, test, packaging

internal/sink/http/web/style.css

@@ -115,3 +115,12 @@ progress {
   white-space: pre-wrap;
   overflow-wrap: anywhere;
 }
+
+[hidden] {
+  display: none !important;
+}
+
+.note {
+  margin: 0;
+  color: var(--muted);
+}