make couchdb processes listen only on 127.0.0.1
since these processes are served by stunnel, they shouldn't be listening on 0.0.0.0, and instead on 127.0.0.1:
tcp 0 0 0.0.0.0:5984 0.0.0.0:* LISTEN 5421/beam.smp
tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 19656/epmd
tcp 0 0 0.0.0.0:9002 0.0.0.0:* LISTEN 5421/beam.smp
(from redmine: created on 2013-05-29, relates #4886 (closed))