Remove disabled/old bigcouch neighbors
root@manatee:~# curl --netrc-file /etc/couchdb/couchdb.netrc -X GET 'http://127.0.0.1:5986/nodes/_all_docs' {"total_rows":4,"offset":0,"rows":[ {"id":"bigcouch@giraffe.bitmask.net","key":"bigcouch@giraffe.bitmask.net","value":{"rev":"1-967a00dff5e02add41819138abb3284d"}}, {"id":"bigcouch@manatee.bitmask.net","key":"bigcouch@manatee.bitmask.net","value":{"rev":"1-967a00dff5e02add41819138abb3284d"}}, {"id":"bigcouch@snake.bitmask.net","key":"bigcouch@snake.bitmask.net","value":{"rev":"1-967a00dff5e02add41819138abb3284d"}}, {"id":"bigcouch@worm.bitmask.net","key":"bigcouch@worm.bitmask.net","value":{"rev":"1-967a00dff5e02add41819138abb3284d"}} ]}
sanke + giraffe are disabled, but still registered as neighbors on manatee
(from redmine: created on 2013-07-01, relates #2658 (closed))