Update runtime files.
diff --git a/runtime/ftplugin/systemd.vim b/runtime/ftplugin/systemd.vim
new file mode 100644
index 0000000..60b3fd9
--- /dev/null
+++ b/runtime/ftplugin/systemd.vim
@@ -0,0 +1,7 @@
+" Vim filetype plugin file
+" Language:  systemd.unit(5)
+
+if !exists('b:did_ftplugin')
+  " Looks a lot like dosini files.
+  runtime! ftplugin/dosini.vim
+endif