add back old peer seed code.

lib/bcoin/pool.js

@@ -1581,10 +1581,35 @@ Pool.prototype.usableSeed = function usableSeed(priority, connecting) {
     }
   }
 
+  // Try the rest of the peers second.
+  for (i = 0; i < seeds.length; i++) {
+    addr = seeds[i];
+    assert(addr.host);
+    if (this.getPeer(addr))
+      continue;
+    if (this.isMisbehaving(addr.host))
+      continue;
+    return addr;
+  }
+
+  // If we are a priority socket, try to find a
+  // peer this time with looser requirements.
+  if (priority) {
+    for (i = 0; i < seeds.length; i++) {
+      addr = seeds[i];
+      assert(addr.host);
+      if (this.peers.load && this.getPeer(addr) === this.peers.load)
+        continue;
+      if (this.isMisbehaving(addr.host))
+        continue;
+      return addr;
+    }
+  }
+
   // If we have no block peers, always return
   // an address.
   if (!priority) {
-    if (connecting)
+    if (all.length === 1)
       return all[Math.random() * (all.length - 1) | 0];
   }