Vhost middleware for Koa. Checks subdomains for
var vhost = require('koa-vhost');
// check for api.localhost:port in development
// check for api.mysite.com in production
app.use(vhost('api', someMiddleware()));
// disable localhost support in development
app.use(vhost('api', someMiddleware(), {localhost: false}));
// glob matching (TODO)
app.use(vhost('*.api', someMiddleware()));