added missing braces {} on foreach and if
Content-Transfer-Encoding value not case sensitive
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 pull request #5598 branch 'hotfix/mail-content-transfer-enconding-non-sensitive'