[qmf] Merge lastest upstream
Squashed 'qmf/' changes from bcc4578..75ccc57

75ccc57 Remove deprecated qMetaTypeId warning.
654abba Correctly start messageserver5 binary.
167c78a OS X: Don't build messageserver binary as a bundle.
6243c57 Comment out a use of QMailThreadSortKey::deserialize.
e431c08 Inherit tst_QCop from QCopAdaptor, as it uses some protected API.
8b0d7d8 Export QMailThreadPrivate, as it uses QPrivatelyImplemented.
f0999f3 Make imap compress with zlib enabled on Mac.
1183b51 Detection of libraries built as framework or dylib on Mac
67cb170 Introduce one step AUTH PLAIN for SMTP.

git-subtree-dir: qmf
git-subtree-split: 75ccc57575295070f01f76e2c21273b6abba89e9
Merge commit 'f45c603ea6fe4dc36f72d0122fad05017e641c03'

Conflicts:
	qmf/tests/tests.pri