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/selinux.pp

@@ -0,0 +1,28 @@
+# certbot::selinux
+class certbot::selinux (
+  Stdlib::Absolutepath  $data_root = $certbot::data_root,
+) {
+
+  if $::facts['os']['selinux']['config_mode'] == 'enforcing' {
+
+    # set httpd_sys_content_t to all files under the www_root
+    selinux::fcontext { "${data_root}/pub":
+      ensure   => 'present',
+      seltype  => 'httpd_sys_content_t',
+      pathspec => "${data_root}/pub(/.*)?",
+    }
+
+    # make sure we can connect to other hosts
+    selboolean { 'httpd_can_network_connect':
+      persistent => true,
+      value      => 'on',
+    }
+
+    exec { "restorecon_${data_root}/pub":
+      path        => ['/bin', '/usr/bin', '/sbin', '/usr/sbin'],
+      command     => "restorecon -Rv ${data_root}/pub",
+      refreshonly => true,
+      subscribe   => Selinux::Fcontext["${data_root}/pub"],
+    }
+  }
+}