This should get rid of some annoying untracable (and usually rare) crashbugs in the
old resolver. Besides that, it makes things look more clean and understandable.
This should be the fix for the following bugids (all the same issue): #2499, #2551, #2558,
#2559, #2603, #2642, #2502, #2501, #2618, #2616.
Feedback and testing is very much welcomed (syzop@unrealircd.com).
- Made async resolve-and-connect work
- Added link::options::nodnscache which means Unreal will not cache the host forever for
outgoing server connections, you could for example enable this if you are linking two servers
with an often changing host (like dyndns.org).
Bram Matthys