Release 4.13

[dougwilson]

This is a tracking issue for release 4.13.

Please keep feature requests in their own issues

If you want to make a comment on a particular change, please make the comment in the "Files changed" tab so comments are not lost during a rebase.

List of changes for release:

• Fix general ETag issues because of using CRC32 app.set('etag','weak') can collide fairly easily with different bodies <= 1KB #2667
• Fix res.format crash when only default provided Fixed: res.format crashing when only default option is provided #2665
• Fix issue where next('route') in app.param would incorrectly skip values Inconsistent router behavior #2655
• Fix using * before params in routes req.params not in correct order when use a * before #2617 Optionally account for extra wildcard groups, fixing #2617 #2637 Fix parameter indexes with path-to-regexp@0.1.6 #2683
• Fix using capture groups before params in routes if optional term in the route, params are shifted in req.params (ROR) #2491
• Use array-flatten module for flattening arrays Use external package to flatten an array in utils #2624

Testing this release

If you want to try out this release, you can install it with the following commands:

$ npm cache clean express
$ npm install strongloop/express#4.13

Owners/collaborators: please do not merge this PR :)

[dougwilson]

Unless any issues come up, this release is pretty much finalized, to be released 6/20 night time, U.S. Eastern.