libfetch from NetBSD's pkgsrc has been imported into lib/fetch, but
the objects are embedded into libxbps. Only a public function to fetch
files has been implemented: xbps_fetch_file().
The library now is built with -fvisibility=hidden by default, and
exported symbols are the ones that use the SYMEXPORT macro.
The code works well enough, but will need many more cleanups.
--HG--
extra : convert_revision : xtraeme%40gmail.com-20091027004600-0lq9aao67lisbzxv
unsigned int and size_t do not match in size in x86_64, so use
unsigned int in functions expecting this type.
--HG--
extra : convert_revision : xtraeme%40gmail.com-20091010141337-vfoiay5nx8edl0ux
