Move cares to extension model

src/node.cc

@@ -1586,11 +1586,6 @@ static Handle<Value> Binding(const Arguments& args) {
     exports = Object::New();
     modp->register_func(exports);
     binding_cache->Set(module, exports);
-  } else if (!strcmp(*module_v, "cares")) {
-    exports = Object::New();
-    Cares::Initialize(exports);
-    binding_cache->Set(module, exports);
-
   } else if (!strcmp(*module_v, "fs")) {
     exports = Object::New();
 

src/node_cares.cc

@@ -761,3 +761,5 @@ void Channel::SockStateCb(void *data, int sock, int read, int write) {
 
 
 }  // namespace node
+
+NODE_MODULE(node_cares, node::Cares::Initialize);

src/node_extensions.h

@@ -1,5 +1,6 @@
 
 NODE_EXT_LIST_START
+NODE_EXT_LIST_ITEM(node_cares)
 #ifdef HAVE_OPENSSL
 NODE_EXT_LIST_ITEM(node_crypto)
 #endif