[Releasing] Removal of engin.io from Qt 5.7

[Oswald Buddenhagen]

On Wed, Jan 27, 2016 at 10:04:57PM +0000, Turunen Tuukka wrote:
> From: Nowacki Jedrzej
> > What is the idea for Qt5.6 which is LTS? Does it make sense to include
> > QtEnginio there?
> > 
> 
> As decided earlier it is included in the Qt 5.6.0 packages, but marked
> as deprecated. As such, it is not subject to the LTS promise. It can
> be dropped out from some patch release of Qt 5.6.x, if it not longer
> needed.
> 
i'd approach this differently:
we already concluded that we cannot *really* remove any modules
(specifically, webkit and quick1 so far) before qt6, as "just use the
old versions if you still need them" has already proven to be
spectacularly unworkable. the consequence is that these modules will be
still available in the installer, but only as sources and with a big fat
warning (or something).
with that in mind, it may be reasonable to "remove" enginio right away
as well, given that discouraging people from using it is acutely urgent.