Fixed https redirection issue

[clarkbains]

This fixes #262, by removing the duplicated part of the path.

[clarkbains]

Travis failed with the following, maybe this is something that needs to be looked into?
Address in use wouldn't have been caused by me.

1) Target with a hostname Should have the host header passed to the target:

     Uncaught Error: listen EADDRINUSE :::54674

      at Server.setupListenHandle [as _listen2] (net.js:1360:14)

      at listenInCluster (net.js:1401:12)

      at Server.listen (net.js:1485:7)

      at test/test_hostheader.js:135:12

      at Promise._execute (node_modules/bluebird/js/release/debuggability.js:384:9)

      at Promise._resolveFromExecutor (node_modules/bluebird/js/release/promise.js:518:18)

      at new Promise (node_modules/bluebird/js/release/promise.js:103:10)

      at testServer (test/test_hostheader.js:127:10)

      at Context.<anonymous> (test/test_hostheader.js:28:5)

  2) Target with a hostname Should not have the host header passed to the target:

     Uncaught Error: listen EADDRINUSE :::54674

      at Server.setupListenHandle [as _listen2] (net.js:1360:14)

      at listenInCluster (net.js:1401:12)

      at Server.listen (net.js:1485:7)

      at test/test_hostheader.js:135:12

      at Promise._execute (node_modules/bluebird/js/release/debuggability.js:384:9)

      at Promise._resolveFromExecutor (node_modules/bluebird/js/release/promise.js:518:18)

      at new Promise (node_modules/bluebird/js/release/promise.js:103:10)

      at testServer (test/test_hostheader.js:127:10)

      at Context.<anonymous> (test/test_hostheader.js:47:5)

  3) Target with a hostname Should return 404 after route is unregister:

     Uncaught Error: listen EADDRINUSE :::54674

      at Server.setupListenHandle [as _listen2] (net.js:1360:14)

      at listenInCluster (net.js:1401:12)

      at Server.listen (net.js:1485:7)

      at test/test_hostheader.js:135:12

      at Promise._execute (node_modules/bluebird/js/release/debuggability.js:384:9)

      at Promise._resolveFromExecutor (node_modules/bluebird/js/release/promise.js:518:18)

      at new Promise (node_modules/bluebird/js/release/promise.js:103:10)

      at testServer (test/test_hostheader.js:127:10)

      at Context.<anonymous> (test/test_hostheader.js:67:5)```

[manast]

If you still want I can merge this now, very sorry for the delay.

[clarkbains]

I realized I accidentally included some other changes that probably shouldn't be included, do you mind if I made a different pr?