Re: ifconfig and some minor fixes.

[Alain Magloire]

> 
> > Some notes: I had to unconditionally add if_index.c to the build
> > since the generic if_nameindex function does not return any
> > information about interface aliases, e.g. elxl2:0. I can't propose
> > any reliable way to check for this in configure.in, so maybe we'd
> > be better off providing the replacement unconditionally...
> 
> I think Solaris' implementation of if_nameindex might need to be fixed ;)
> I prefer the more standardized interface, but I understand the problem.
> I don't want to use if_index.c on the Hurd though, so we will have to add
> some configure check for this.  For example, use if_nameindex if available,
> otherwise fall back to if_index.c, but leave the possibility for platform
> specific overrides in configure.c.  Sun would get one because of the
> aliases.

QNX/Neutrino does not provide rfc2133 if_nameindex() suite, unfortunate.
Can we implement something and autodetect if_nameindex() and suite.

--
alain