[Development] Focusing bug fixes to 5.9 branch and patch releases during H1/17

[Oswald Buddenhagen]

On Sun, Feb 12, 2017 at 03:38:02PM -0800, Thiago Macieira wrote:
> The win32-msvcXXXX mkspecs have been dropped as of Qt 5.8.0.
>
5.8.1 (so 5.9.0, by all appearances).