when proxying to proxy, slash is removed from protocol

Created by: tu1ly

hi,

  target =
    protocol: 'http:',
    host: 'sometarget.io:80',
    port: '80',
    hostname: 'sometarget.io',
    hash: null,
    pathname: 'http://www.google.com',
    path: 'http://www.google.com',

  proxy.web(req, res, { target, toProxy: true, prependPath: true})

path: 'http://www.google.com' becomes path: 'http:/www.google.com/' in https://github.com/nodejitsu/node-http-proxy/blob/master/lib/http-proxy/common.js#L153 .

Peter