Send correct response for HEAD requests

[kanongil]

I noticed that a HEAD request for some of my routes did not send the content-length header, while a normal GET request would. I have updated the logic to properly set the header. This is done by not skipping the marshal step.

This also fixes specific cases where the content-type header could be different for GET and HEAD if it is set during or post marshaling.

FYI, the modified and new test both fail on current master as follows:

Failed tests:

  141) Connection route() responds to HEAD requests for a GET route:

      Expected undefined to equal specified value

      at /hapijs/hapi/test/connection.js:1690:63

  143) Connection route() returns 500 on HEAD requests for failed responses:

      actual expected

      200500

      Expected 200 to equal specified value

      at /hapijs/hapi/test/connection.js:1749:48

[kanongil]

Rebased to latest master. Any chance you could look into this?

It's a bit unfortunate that GETand HEAD for the same resource can return different content-type headers.

Also, what happened to the travis integration?

[lock]

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