(PR#21696) PATCH - ADNS used for reverse

Per I. Mathisen <per...> writes:

> 
> 
> <URL: 
http://bugs.freeciv.org/Ticket/Display.html?id=21696
>
> 
> Parsing resolv.conf and windows registry does not sound
good. How about we 
> just use http://daniel.
haxx.se/projects/c-ares/ ? It is what curl is 
> using.

ares_init.c +407, +567, parsing of windows registry and
resolv.conf!
Well seems even the big boys don't avoid special casing to
solve this
problem .

C-ares looks good though. The reason I didn't use a more
evolved lib over
tADNS in the first place is because it would have been a
pain to munge
the Makefiles to include another lib in 2.0 (I'm not an
autoconf expert :/).

> We can strip it down, and include it along with lua and
the other 
> dependencies we have in the repository.

Now that I have examples of other libs (lua) it should be
easy to do.