Mime\Message: createFromString: decode transfer encoding
Merge branch 'hotfix/4929'

Close #4929
Merge pull request #4934 from SlikNL/mime-decode

Mime\Message: createFromString: decode transfer encoding
Merge branch 'hotfix/4934' into develop

Forward port #4934

Conflicts:
	library/Zend/Mime/Message.php
	tests/ZendTest/Mime/MimeTest.php