as I promised long, long ago, ecore now has its own asynchronous dns resolver! everyo...

as I promised long, long ago, ecore now has its own asynchronous dns resolver! everyone cheer for not needing c-ares any longer!

dns.c is the work of William Ahern (http://25thandclement.com/~william/projects/dns.c.html) and has been in development for ~4 years.
it has zero documentation, no examples, and no comments: I'm pretty sure he's an EFL developer in disguise.

this new resolver is roughly 10-12% faster than c-ares, will never randomly break, requires no external libraries, and is much simpler on the efl side.

by default, dns.c resolution is enabled any time ipv6 support is detected and c-ares support is not requested;
it should work on all platforms (wink wink vtorri), but it has no way of disabling ipv6 (someone can go through dns.c/h and do that if they feel so inclined)

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/ecore@71690 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33