[sldev] SNOW-2 (Curl crash) update

[Tofu Linden]

Thickbrick Sleaford wrote:
> There is also an unfixed windows-only crash in libcurl:
> 
> http://curl.haxx.se/docs/knownbugs.html
>> 64. The threaded resolver used in libcurl on Windows has some kind of race
>>  problem when multiple simultanoes resolves are done, like with the multi
>>  interface transferring many files in parallell:
>>  http://curl.haxx.se/mail/lib-2009-04/0028.html

That's not good.
The good news is... the c-ares resolver option for libcurl works on
Windows (last I tried) so we could switch to that and dodge the cited
bug.  There just hasn't been a point until now.