iOS8 disable auto-connect wifi

iOS6 used to have the option to disable automatic connection to specific Wifi networks. This is gone in later versions of iOS yet is crucial in urban areas with abundant open web login networks in cafés etc. Has anyone figured out a hack, a third party app or so, to bring back this crucial feature?

Internet searches turn up nothing, only other questions of the same fact, and answers saying "the asker is an idiot and this is standard behaviour on all mobile devices and how things should be". Maybe this attitude stems from different culture -- the US culture from where the tech companies offering substandard products come from -- where there are perhaps few weblogin networks? But in Europe the situation is different. It is frustrating to have internet stop working on the street, because instead of 3G, the phone has connected to a web login network radiating from the nearby café, e.g., the very common _TheCloud in the UK. At the same time, having wifi enabled is crucial, because even at my home in the centre of an important university town there is in practise no 3G -- not to even speak of LTE, for which I would not pay on this island that has worse signal quality than the third-world countries I've visited. In many cafés in particular there is no 3G reception, and a frequent need to use _TheCloud. The option of manually forgetting a network after each use is a purely unusable alternative, moving the task of remembering from the device to the user – yet IT should ease our lives, and have an option that needs to be set only once and forgot!