Add fact for FreeRADIUS major version

lib/facter/freeradius_maj_version.rb

+# Grab the FreeRADIUS version from the output of radiusd -v
+if %x{which radiusd 2>/dev/null | wc -l}.chomp.to_i > 0
+  Facter.add(:freeradius_maj_version) do
+    setcode do
+      Facter::Core::Execution.exec('radiusd -v').split(/\n/)[0].match(/FreeRADIUS Version (\d)\.\d\.\d/)[1]
+    end
+  end
+end
+