add new systemd class

NEWS

 Unreleased
 
-    [dns] Changes Livermore detection to use the system's primary IP address, 
+    [systemd] New class to allow systemd daemon reloads. (adamhl)
+
+    [dns] Changes Livermore detection to use the system's primary IP address,
     instead of using a manually-set parameter. (akkornel)
 
-    [kerberos] Automatically determine if we are in Livermore; if we are, place 
+    [kerberos] Automatically determine if we are in Livermore; if we are, place
     the Livermore-based KDC at the top of the list. (akkornel)
 
     Clients who are using the base::kerberos::dr class should immediately switch

manifests/systemd.pp

+# This code is from the Puppet Forge project justin8-systemd
+#
+# If you want to reload the systemd service on a unit file change, include
+# this class and add a dependency:
+#
+#    notify => Exec['systemd-daemon-reload']
+#
+
+class systemd {
+
+  exec { 'systemd-daemon-reload':
+    path        => '/bin:/usr/bin:/sbin:/usr/sbin',
+    command     => 'systemctl daemon-reload',
+    refreshonly => true,
+  }
+
+  case $::osfamily {
+    'Archlinux': {
+      $unit_path = '/usr/lib/systemd/system'
+    }
+    'Debian': {
+      $unit_path = '/lib/systemd/system'
+    }
+    'RedHat': {
+      $unit_path = '/usr/lib/systemd/system'
+    }
+    default: {
+      $unit_path = '/usr/lib/systemd/system'
+    }
+  }
+
+}