Parametrize setting for correct_escapes

The default is set to match the upstream example config supplied by
freeradius 3.x.

manifests/init.pp

@@ -13,6 +13,7 @@ class freeradius (
   $syslog          = false,
   $log_auth        = 'no',
   $preserve_mods   = true,
+  $correct_escapes = true,
 ) inherits freeradius::params {
 
   validate_re($freeradius::fr_version, '^3', 'This module is only compatible with FreeRADIUS 3')

templates/radiusd.conf.erb

@@ -136,7 +136,7 @@ pidfile = ${run_dir}/${name}.pid
 #
 #  $ grep '\\\\' $(find raddb -type f -print)
 #
-correct_escapes = true
+correct_escapes = <%= @correct_escapes %>
 
 #  panic_action: Command to execute if the server dies unexpectedly.
 #