Try more than the first address for a DNS -addnode.

src/net.cpp

@@ -1554,7 +1554,7 @@ void ThreadOpenAddedConnections2(void* parg)
         return;
     }
 
-    loop
+    for (unsigned int i = 0; true; i++)
     {
         list<string> lAddresses(0);
         {
@@ -1594,7 +1594,7 @@ void ThreadOpenAddedConnections2(void* parg)
         BOOST_FOREACH(vector<CService>& vserv, lservAddressesToAdd)
         {
             CSemaphoreGrant grant(*semOutbound);
-            OpenNetworkConnection(CAddress(*(vserv.begin())), &grant);
+            OpenNetworkConnection(CAddress(vserv[i % vserv.size()]), &grant);
             Sleep(500);
             if (fShutdown)
                 return;