logwatch: Add support for setting the mail sender address

logwatch/manifests/init.pp

@@ -3,7 +3,10 @@
 # === Global variables
 #
 #   $logwatch_mailto:
-#       Logwatch mail recipient.
+#       Logwatch mail recipient address.
+#
+#   $logwatch_mailfrom:
+#       Logwatch mail sender address.
 #
 #   $logwatch_level:
 #       Logwatch detail level for report. Valid values are

logwatch/templates/logwatch.conf.erb

@@ -2,6 +2,9 @@
 <% if @logwatch_mailto -%>
 MailTo = <%= @logwatch_mailto %>
 <% end -%>
+<% if @logwatch_mailfrom -%>
+MailFrom = <%= @logwatch_mailfrom %>
+<% end -%>
 <% if @logwatch_level -%>
 Detail = <%= @logwatch_level %>
 <% end -%>