Revert "Remove broadcastVanishRequest policy to see if that is causing a crash"

This reverts commit 7b32b6f.

Author: mplorentz

strfry/plugins/policies.ts

@@ -27,6 +27,7 @@ const policies = [
   // Async policies
   [antiDuplicationPolicy, { ttl: 60000, minLength: 50 }],
   [rateLimitPolicy, { whitelist: [localhost] }],
+  broadcastVanishRequests,
 ];
 
 for await (const msg of readStdin()) {