Fix bad link format in the guide
Update links extend -> ninenines
Fix language in getting started
Accept absolute URI scheme as uppercase

We should be doing a case insensitive comparison to be correct,
but this is more expensive. Almost all clients send lowercase,
this patch fixes handling of the aws/aws-sdk-php client which
sends uppercase, and no known client sends mixed case so I am
holding back on the more expensive solution for the moment.
Handle absolute URIs that lack a path entirely
Fix REST guide reference to accept_missing_post

The guide refers to accept_missing_post instead of allow_missing_post.
Merge branch 'patch-1' of git://github.com/asabil/cowboy
Add cowboy_req:part/2 export
Fix incorrect type in cowboy_static manual
Merge branch 'master' of git://github.com/okeuday/cowboy