Select vocabularies per scheme

I think there would be great benefit to having the ability to select which vocabularies are used for access control specifically for each scheme.

There are times when you are using different schemes for different purposes, using different vocabularies. Having to select terms for all the tac_lite vocabs in each scheme is not viable in a lot of cases.

A solution for the issue #333320: "All" option per vocab for by default access to All terms (and new ones automatically). would also solve this problem but I think this feature would be a good idea.

If I get some time soon I will look at this issue and make a patch.