[fpc-pascal] xmlrpc unit

[Marco van de Voort]

In our previous episode, Graeme Geldenhuys said:
> > Fixes still contains it. Most of the fpweb changes are not merged back to
> > 2.4.x
> 
> As usual you don't understand me correctly, as your above statement proves.
> Let me explain again. The r15346 should not be merged to 2.4.x yet,

(or at all)

> the
> code in 2.4.x should FIRST be marked as deprecated for one release (maybe
> even as soon as FPC 2.4.2 seeing that the 'deprecated' hint directive
> doesn't break anything).

We all know that, but we don't do that for a reason:

Unit level deprecated  is 2.5.1 functionality (r14767 , Mantis 13373)

Still, comments could be added and procedures/methods flagged. I'll take
care of this. I also added to user changes trunk.

Michael, please have a look and expand on it:

http://wiki.freepascal.org/User_Changes_Trunk

> Then only in the NEXT release should r15346 be
> merged, resulting in those units being removed.

Units are generally only removed between major releases. I'm not so sure
this will happen at all.  Specially since the mutation rate of the new stuff
is still high. 

As you can see in http://www.stack.nl/~marcov/fpctomerge.txt or your local
GIT equivalent, most of the fcl-web/json stuff is not merged.