Improper use of req.accepts() -- Accept header ignored as a result

[acorretti]

The way Response.format uses the req.accepts() function does not seem right according to its implementation. As a result, browser's "Accept:" header may get ignored and the first formatter defined always used.

As of 2.6.3 Restify is looping over a server's acceptable types, checking each with req.accepts( type ) until one gets returned, to select it.

Instead, Request.accepts should be fed the whole array of acceptable types, to then return the most appropriate one.