Taking over maintainership of cpphs, HaXml, hscolour, and polyparse

[Henning Thielemann]

On Tue, 30 Oct 2018, Malcolm Wallace via Libraries wrote:

> I am afraid I have been rather lax at maintaining these packages 
> recently, for which I apologise.  Since darcs.haskell.org closed, it has 
> been difficult to publish updates.  I am in the process of converting 
> the darcs repositories into git, but I have hit a roadblock in finding a 
> host for these.

I'd prefer conversion to darcs-2 and move to hub.darcs.net.