feat: certbot reorg

- moved certbot into its own module
- added fact to list available certificates
- created systemd timer to rsync data to $data_dir/pub
- ensure the $data_dir/pub exists
- manage selinux for nginx

modules/certbot/manifests/haproxy.pp

@@ -0,0 +1,9 @@
+# certbot::haproxy
+class certbot::haproxy {
+  # export haproxy balancemember
+  profiles::haproxy::balancemember { "${facts['networking']['fqdn']}_8888":
+    service => 'be_letsencrypt',
+    ports   => [8888],
+    options => []
+  }
+}