Sorry, I missed a comma in the original commit.

The obective here isn't to modify the URL; that logic works just fine.

The objective is to make socket.io adhere to a subdomain, if any; since socket.io insists on extracting the domain:
[handshake](https://github.com/LearnBoost/socket.io-client/blob/0.9/dist/socket.io.js#L1621), [io.connect](https://github.com/LearnBoost/socket.io-client/blob/0.9/dist/socket.io.js#L77)