[fpc-pascal] CustHTTPApp and PUT method

[Marco van de Voort]

In our previous episode, Sven Barth said:
> > trunk supports PUT?
> >
> FPC 2.6.4 would support it as well as the according revision (if I've 
> found the correct one) has been merged to 2.6.3...

Most webrelated stuff (so also json) is merged, except some very new revs.

Of the older commits only fcl-sdo is not merged afaik. (if it is webrelated
at all, dunno what it is)