#6209 - Update test case so it actually tests the thing it should be testing
Merge branch 'DASPRiD-bugfix/merging-inputs-with-allow-empty'
Performance improvement on response line iteration
Merge pull request #6333 from mdurrant/master

Fix for performance issue in Http\Response
Merge branch 'hotfix/6333'

Close #6333
Merge branch 'hotfix/6333' into develop

Forward port #6333
Replaced wrong placeholder in Exception string
Merge branch 'eiwaen-bugfix/6377'
Merge branch 'eiwaen-bugfix/6377' into develop
Fix parameter format causing duplicate mails

Recently I've experienced mails being duplicated and send to the sender when using the sendmail transport. After consulting my hosting company they told me there shouldn't been a space between "-f" and the envelope sender address. Removing the space character fixed the problem. No more duplicated mails being send to the sender.

Furthermore I tested Swiftmailer and its sendmail transport layer. Absolutely no problems with it.

Looking at the php docs there isn't a space character either, see http://www.php.net/manual/en/function.mail.php#example-3471. Furthermore I found http://stackoverflow.com/questions/4205228/basic-mail-function-php-additional-f-parameter-question and consulted the sendmail docs too: http://www.sendmail.org/~ca/email/man/sendmail.html.

However, there are other examples around with a space character: http://stackoverflow.com/questions/179014/how-to-change-envelope-from-address-using-php-mail. Are they wrong?

Since I'm not familiar with sendmail but actually trusting my hosting company I'm proposing to remove the space character.
Update SendmailTest.php
Added the file encryption/decryption to Zend\Crypt
Added the SymmetricInterface to setCipher()
Added a checkFileInOut() to check files for encryption/decryption + minor fixes
Minor fixes
Merge branch 'feature/#6438-new-file-encrypt' into develop
Added the limit, offset support to DB2
Fixed some php-cs issues
Fixed and simplified the ROW_NUMBER() usage for DB2
Fixes #6467