Merge commit 'refs/pull/3130/head' of github.com:zendframework/zf2 into hotfix/add-space-after-function-keyword
Merge pull request #3130 branch 'hotfix/add-space-after-function-keyword'
Fix accessing of headers directly
[ZF-8825] Lower-case lookup for "authorization" header

- A number of libraries, including CordovaJS, send the Authorization
  header as "authorization" (all lowercase); added a conditional check
  for this.
- Cannot test this, as it depends on the output of
  apache_request_headers().
Merge pull request #3398 branch 'hotfix/request-toString'
Merge branch 'master' of https://github.com/zendframework/zf2
Merge branch 'master' of github.com:zendframework/zf2
Merge commit 'refs/pull/3403/head' of github.com:zendframework/zf2 into hotfix/zf8825
[#3403] Optimize number of conditions
Merge pull request #3403 branch 'hotfix/zf8825'
Merge branch 'master' of https://github.com/zendframework/zf2