All number types including enums are parse as if they were integers,
this breaks in many ways, long and int are not the same size in all
architectures as well as enum may vary in size depening on compiler,
architecture and optimizations.

Always pass an actual long to PyArg_ParseTuple() and rely on the a
cast from long to the destination variable type in the following
assignment.

Signed-off-by: Simo Sorce <simo@redhat.com>

fixes #4077

Instad of referring to an old FSF address, point the reader to the FSF
website where the latest licenses and addresses are published.

Signed-off-by: Simo Sorce <simo@redhat.com>

The binding does a raise Error('failed to create object') but the local Error
exception class expects a lasso error code, and will thus fail if printed.

  File ".../lasso.py", line 54, in __str__
    return '<lasso.%s(%s): %s>' % (self.__class__.__name__, self.code,
             _lasso.strError(self.code))
  TypeError: an integer is required

adapt to new checks done on logout request nodes

Libxml stopped exposing the internal of the xmlOutputBuffer structure;
it was replace by proper use of the API and of the xmlBuffer structure.

There could be regression for older version of libxml as some functions
appeared in recent version of libxml; but the reference API document
does not give any introduction date for functions so it's hard to be
sure.