REVERTED: Do not do DNS if there is a matching parent and object is HIT-STALE

[vmamidi]

This fixes #2376

[SolidWallOfCode]

What happens if there is no parent selection? Does the child not get the address for the upstream?

[vmamidi]

Child will get upstream address if there are no parents or go_direct is true and all the parents are down.
HandleCacheOpenReadHit handles all the possible scenarios.

[SolidWallOfCode]

I wonder why that code was put there in the first place. It does look like HandleCacheOpenReadHit will do address resolution if the address for the server isn't valid. I also wonder why it checks force_dns rather than checking the server.dst_addr directly.

[vmamidi]

I cleaned up most of the code while working on fixing the HostDB deadlocks #1756 .

[zwoop]

I've reverted this, we observed a crasher, outlined in #4009.