Add default.settings.php changes from 7.91.

sites/default/default.settings.php

@@ -782,3 +782,26 @@
  * directory.
  */
 # $conf['skip_permissions_hardening'] = TRUE;
+
+/**
+ * Additional public file schemes:
+ *
+ * Public schemes are URI schemes that allow download access to all users for
+ * all files within that scheme.
+ *
+ * The "public" scheme is always public, and the "private" scheme is always
+ * private, but other schemes, such as "https", "s3", "example", or others,
+ * can be either public or private depending on the site. By default, they're
+ * private, and access to individual files is controlled via
+ * hook_file_download().
+ *
+ * Typically, if a scheme should be public, a module makes it public by
+ * implementing hook_file_download(), and granting access to all users for all
+ * files. This could be either the same module that provides the stream wrapper
+ * for the scheme, or a different module that decides to make the scheme
+ * public. However, in cases where a site needs to make a scheme public, but
+ * is unable to add code in a module to do so, the scheme may be added to this
+ * variable, the result of which is that system_file_download() grants public
+ * access to all files within that scheme.
+ */
+# $conf['file_additional_public_schemes'] = array('example');