[Development] Qt5.15 deprecating & Qt6 removing QProcess::setupChildProcess

[Oswald Buddenhagen]

On Fri, Feb 21, 2020 at 08:29:54AM -0800, Thiago Macieira wrote:
>can we deprecate setupChildProcess() in Qt 5.15 and *remove it* in 6.0?
>
at least, we should. ;)
but let's bikeshed the name of the callback setter, which needs to be 
added at the same time - 
setChildProcess{Modifier,Initializer,Setup,...}() ^^