Issue #2979542 by AndKar: Drupal 8 sub-sites gets error message: ”The…

… provided host name is not valid for this server”

Provision/Config/Drupal/provision_drupal_settings_8.tpl.php

@@ -173,7 +173,7 @@
   $esc_uri = str_replace('.', '\.', $this->uri);
   print "    '^{$esc_uri}\$',\n";
   foreach ($this->aliases as $alias_url) {
-    $esc_alias = str_replace('.', '\.', $alias_url);
+    $esc_alias = preg_replace(['/\./', '/\/.+/'], ['\.', ''], $alias_url);
     print "    '^{$esc_alias}\$',\n";
   }
 ?>