Well I hope it fixes the total failure of IOS to remember/use the stored credentials for authenticated http proxies.
This was broken when IOS7 came out and has remained broken since. We have had it acknowledged by Apple this is a bug and that it will be "fixed in the next release of IOS". Well a lot of releases have come and gone including a Major release (IOS8) and it is STILL broken.
Where I work (a University) we are now buying Android tablets because they actually work on the network, and you now have to justify any IOS device, the view is, if it does not work on our network it is just a status symbol and a toy.
And currently, I agree.