614087 Fix Socket API usage to allow Windows64 compilation
In Windows 64 a socket is no more represented by an int,
this breaks the nanoftp API and nanoftp/nanohttp, the patch
changes this and fix the API for Win64
Regenerated the XML and documentation as a result too.
finished the integration with devhelp, completing the index and inserted
* libxml.spec.in doc/devhelp/*: finished the integration with
devhelp, completing the index and inserted into the gtk-doc
database at "make install" stage
Daniel