RUBY-556 fix potential deadlocks with broadcast

TylerBrock · Brandon Black · commit 04fbff33201e · 2013-02-14T08:02:01.000-08:00
diff --git a/lib/mongo/util/pool.rb b/lib/mongo/util/pool.rb
@@ -166,7 +166,7 @@ def ping
     def checkin(socket)
       @connection_mutex.synchronize do
         if @checked_out.delete(socket)
-          @queue.signal
+          @queue.broadcast
         else
           return false
         end
