Minor changes to previous build downloading

Build/lib/download-publicsuffixlist.ts

@@ -0,0 +1,14 @@
+import { TTL, fsFetchCache } from './cache-filesystem';
+import { defaultRequestInit, fetchWithRetry } from './fetch-retry';
+import { createMemoizedPromise } from './memo-promise';
+
+export const getPublicSuffixListTextPromise = createMemoizedPromise(() => fsFetchCache.apply(
+  'https://publicsuffix.org/list/public_suffix_list.dat',
+  () => fetchWithRetry('https://publicsuffix.org/list/public_suffix_list.dat', defaultRequestInit).then(r => r.text()),
+  {
+    // https://github.com/publicsuffix/list/blob/master/.github/workflows/tld-update.yml
+    // Though the action runs every 24 hours, the IANA list is updated every 7 days.
+    // So a 3 day TTL should be enough.
+    ttl: TTL.THREE_DAYS()
+  }
+));