Google+ social service has been updated with an interesting privacy change this afternoon. “By popular demand, we’re rolling out a feature that lets you disable comments and lock your posts before sharing to the Google+ stream,” writes Googler Ebby Amirebrahimi on his own Google+ page. Disabling comments is a pretty straightforward feature, and locking a post means that no one will be able to reshare that post in other circles or with other people. In other words, being able to lock a post means you have complete control over w