Next version of Debian is 10

Still in testing (but frozen), on Debian Buster actually the fact 'operatingsystemmajrelease' resolves to 'buster/sid'

manifests/params.pp

@@ -87,11 +87,15 @@ class freeradius::params {
     'Debian': {
       $fr_basepath = $::operatingsystemmajrelease ? {
         '9'          => '/etc/freeradius/3.0',
+        '10'         => '/etc/freeradius/3.0',
+        'buster/sid' => '/etc/freeradius/3.0',
         '18.04'      => '/etc/freeradius/3.0',
         default      => '/etc/freeradius',
       }
       $fr_raddbdir = $::operatingsystemmajrelease ? {
         '9'          => "\${sysconfdir}/freeradius/3.0",
+        '10'         => '\${sysconfdir}/freeradius/3.0',
+        'buster/sid' => '\${sysconfdir}/freeradius/3.0',
         '18.04'      => "\${sysconfdir}/freeradius/3.0",
         default      => "\${sysconfdir}/freeradius",
       }