fix type hint.
added missing braces {} on foreach and if
Content-Transfer-Encoding value not case sensitive
Merge pull request #5579 in master
Merge pull request #5532
Merge pull request #5532 from zhanxu/patch-1

fix type hint.
Merge pull request #5532 into master
Back-port of copyright changes to master

Diff based on PR #5654 (git diff a961e19..fd935cf), applied skipping unmatched files
Merge branch 'hotfix/ViewHelperCleanup'
Merge pull request #5550 from samsonasik/add/braces

added missing braces {} on foreach and if
Merge commit 'refs/pull/5598/head' of github.com:zendframework/zf2 into hotfix/mail-content-transfer-enconding-non-sensitive
Merge remote-tracking branch 'upstream/master' into develop

Conflicts:
	library/Zend/Http/Header/AbstractAccept.php
Forward #5598

Conflicts:
	library/Zend/Mail/Header/ContentTransferEncoding.php