Not compatible with connect-static-file middleware

[skleeschulte]

connect-static-file middleware does not work with union. With connect, it works as expected:

var connect = require('connect')
  , http = require('http')
  , staticFile = require('connect-static-file');

var app = connect()
  .use(staticFile('index.js'));

http.createServer(app).listen(3000);

With union, the browser never gets a response (loading and loading and loading)...:

var connect = require('connect')
  , union = require('union')
  , staticFile = require('connect-static-file');

var server = union.createServer({
  buffer: false,
  before: [
    staticFile('index.js')
  ]
}).listen(3000);

connect-static-file uses send under the hood. Tested with:

"connect": "^3.6.2",
"connect-static-file": "^1.2.0",
"union": "^0.4.6"
node v6.10.3