In response to a challenge from Jan Lehnart during the Berlin CouchDB training, I added a "cancel" link to the status page of Futon, so that running continuous replications can be cancelled.
It can only cancel "vanilla" continuous replications, so ones that use filter functions or create_target will not work. I understood from Jan that this is fine, because later CouchDB versions will have sessions addressable as resources. Until then, this patch can cancel the continuous replications that Futon allows you to start.
I wanted to try out github, so I forked and committed: