update readme and make dht bootstrap work with low peer count

include/llarp/dht/bucket.hpp

@@ -18,6 +18,12 @@ namespace llarp
 
       Bucket(const Key_t& us) : nodes(XorMetric(us)){};
 
+      size_t
+      Size() const
+      {
+        return nodes.size();
+      }
+
       bool
       GetRandomNodeExcluding(Key_t& result,
                              const std::set< Key_t >& exclude) const

llarp/dht/context.cpp

@@ -634,11 +634,21 @@ namespace llarp
       std::vector< RouterID > closer;
       Key_t t(target.data());
       std::set< Key_t > found;
-      if(!nodes->GetManyNearExcluding(t, found, 4,
+      size_t nodeCount = nodes->Size();
+      if(nodeCount == 0)
+      {
+        llarp::LogError(
+            "cannot handle exploritory router lookup, no dht peers");
+        return false;
+      }
+      size_t want = std::min(4UL, nodeCount);
+      if(!nodes->GetManyNearExcluding(t, found, want,
                                       std::set< Key_t >{ourKey, requester}))
       {
         llarp::LogError(
-            "not enough dht nodes to handle exploritory router lookup");
+            "not enough dht nodes to handle exploritory router lookup, "
+            "need a minimum of ",
+            want, " dht peers");
         return false;
       }
       for(const auto &f : found)

readme.md

@@ -6,4 +6,11 @@ You can learn more about the high level design of LLARP [here](doc/high-level.tx
 
 And you can read the LLARP protocol specification [here](doc/proto_v0.txt)
 
-To build lokinet see the [lokinet-builder](https://github.com/loki-project/lokinet-builder) repository.
+To build lokinet see the [lokinet-builder](https://github.com/loki-project/lokinet-builder) repository.
+
+
+Download the latest release:
+
+https://github.com/loki-project/loki-network/releases
+
+If your platform doesn't have a release binary try building from source and report any bugs you find along the way.