Better handling of _replicator db deletes
Better handling of _replicator db deletes

When a _replicator db is deleted all running replications based on that db
need to be canceled.

BugzID: 17426
BugzID: 17571

fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb