Still there. Find a call in history or in box. Click on the More tab below the number.
You are correct.
Before there was an option under Voice Mail Greeting to block the caller.
I didn't know you could block the number from History.
I'm going to delete the extraneous info from my post.
EDIT:
When I deleted the blocking part of my post it was basically the same as giqcass's post, so I just deleted it.