Fix documentation about parameter port.

This uptdates the documentation to match the current code concerning parameter port.

README.md

@@ -112,15 +112,9 @@ class { '::chrony':
 ```puppet
 class { '::chrony':
   queryhosts  => [ '192.168/16', ],
-  port        => 123,
 }
 ```
 
-#### Note
-
-The parameter `port` is also set here,
-module default is `0` to ensure server mode is not activated accidentally.
-
 ### How to configure leap second
 
 ```puppet

REFERENCE.md

@@ -78,7 +78,6 @@ class { 'chrony':
 ```puppet
 class { 'chrony':
   queryhosts => ['192.168/16'],
-  port       => 123,
 }
 ```
 

manifests/init.pp

@@ -29,7 +29,6 @@
 # @example Allow some hosts
 #   class { 'chrony':
 #     queryhosts => ['192.168/16'],
-#     port       => 123,
 #   }
 # @example Configure the leap second mode
 #   class { 'chrony':
@@ -136,10 +135,9 @@
 #   Also see [`makestep_seconds`](#makestep_seconds).
 # @param queryhosts
 #   This adds the networks, hosts that are allowed to query the daemon.
-#   Note that `port` needs to be set for this to work.
 # @param port
-#   Port the service should listen on, to be used in combination with `queryhosts`.
-#   Module default is `0` to prevent accidental activation of server mode.
+#   Port the service should listen on.
+#   Module default is undef.
 # @param service_enable
 #   This determines if the service should be enabled at boot.
 # @param service_ensure