Fix DateTime with recent versions of tzdata

An backport of http://trac.webkit.org/changeset/150833 needed for
correct time KRAT, YAKT and MOS timezones.

Task-number: QTBUG-41422
Change-Id: I6e9d1db690fee8d77faa1d76c836bd7b345ce854
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
Fix libmng test.

libmng pulls in libjpeg. In turn libjpeg requires that code that uses it should
include stdio.h [0].

[0] <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=461602#10>

So adding the corresponding include before libmng solves the issue.

(cherry picked from qtimageformats/08f40bc0f00716c3a8cbda70ed00dc2f16515e85)
Change-Id: Ib249fa9d867536c19be8e376f6c5595080cab006
Reviewed-by: Dmitry Shachnev <mitya57@gmail.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
QLineEdit: Disable standard key 'cut' when there is no selection.

(cherry-picked from qtbase/0aa84a619ea0a7c85a1ed48ed28817d4c7e40b33)
Task-number: QTBUG-40477
Change-Id: I48aa7ecc4ee8a8e4e9feaf9b6cba5109d2d1f725
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Backport: use backslashes for UNCs path

ShellExecute fails to open a share folder due to using '/' instead of '\'.

Windows API doesn't support forward slashes for extended-length path.
Extended-length path are path that start with a "\\?\" prefix. For example,
"\\?\c:\very_long_path\foo\bar.txt", or in the case of a UNC path that
would be "\\?\very_long_path\foo\bar.txt". [1]

[1] http://msdn.microsoft.com/en-us/library/aa365247%28VS.85%29.aspx#maxpath

(cherry-picked and adapted from qtbase/18c916517f3004d34482c20ed66bf09ec274d385)
Task-number: QTBUG-13359
Change-Id: I2f38ecb76d87b87dc1d40bd48c94c78550a6ca1f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>