Re: ifconfig and some minor fixes.

[Sergey Poznyakoff]

> It's just a thought, but since they
> are not standard(?) maybe we could always fall back
> to ifr_addr? or provide/check the macro?

I suppose we'd better check for ifr_netmask in configure.in:

IU_CHECK_STRUCT_FIELD(ifreq,
                      ifr_netmask,
              [#include <sys/socket.h>
               #include <net/if.h>])

and then just do

#ifndef HAVE_IFREC_IFR_NETMASK
# define ifr_netmask ifr_addr
#endif

in appropriate header.

By the way, did the if_index patch work on Neutrino?

Cheers,
Sergey