servo: bitmagnet: raise the crawl rate

hosts/by-name/servo/services/bitmagnet.nix

@@ -8,6 +8,18 @@
     description = "colin-bitmagnet";
   };
 
+  services.bitmagnet.settings = {
+    # dht_crawler.scaling_factor: how rapidly to crawl the DHT.
+    #   influences number of worker threads, buffer sizes, etc.
+    #   default: 10.
+    #   docs claim "diminishing returns" above 10, but seems weakly confident about that.
+    dht_crawler.scaling_factor = 64;
+    # tmdb.enabled: whether to query The Movie DataBase to resolve filename -> movie title.
+    #   default: true.
+    #   docs claim 1 query per second rate limit, unless you supply your own API key.
+    tmdb.enabled = false;
+  };
+
   # bitmagnet web client
   # protected by passwd because it exposes some mutation operations:
   # - queuing "jobs"