[PATCH][PING] Improve strncpy performance further

[Wilco Dijkstra]

> Wilco Dijkstra wrote:
> ping
> 
> > Wilco Dijkstra wrote:
> > > > Roland McGrath:
> > > > Has to be __strnlen.
> > >
> > > Good point, so it becomes:
> > >
> > > -  return s;
> > > +  size_t size = __strnlen (s2, n);
> > > +  if (size != n)
> > > +    memset (s1 + size, '\0', n - size);
> > > +  return memcpy (s1, s2, size);
> >
> > OK for trunk with __strnlen?
> >
> > Wilco