Increase xinetd connections for rsync

- Increase connections to 512 with 10 second rate
- Set per_source to UNLIMITED
- Specify IPv4 flag

Change-Id: Ia007301eca8e006e9792c73d0d35350588c48b96
Closes-bug: 1330495
Closes-bug: 1322577

deployment/puppet/rsync/manifests/server.pp

@@ -20,6 +20,9 @@
     xinetd::service { 'rsync':
       bind        => $address,
       port        => '873',
+      cps         => '512 10',
+      per_source  => 'UNLIMITED',
+      flags       => 'IPv4',
       server      => '/usr/bin/rsync',
       server_args => '--daemon --config /etc/rsync.conf',
       require     => Package['rsync'],