psutil_net_io_counters on Solaris has send and received swapped

[grobian]

Python code:

def net_io_counters(pernic=False):
    """Return network I/O statistics as a namedtuple including
    the following fields:

     - bytes_sent:   number of bytes sent
     - bytes_recv:   number of bytes received
     - packets_sent: number of packets sent
     - packets_recv: number of packets received

C-code however, has them swapped (psutil/_psutil_sunos.c):

        py_ifc_info = Py_BuildValue("(KKKKkkii)",
                                    rbytes->value.ui64,
                                    wbytes->value.ui64,
                                    rpkts->value.ui64,
                                    wpkts->value.ui64,

I can come up with a simple patch, but I figure it's obvious what needs to be changed :)

[giampaolo]

Please submit a pull request (and also update HISTORY.rst and CREDITS.rst).