adding an example to opt-out of the privatebin directory

robots.txt

@@ -6,3 +6,8 @@
 
 User-agent: *
 Disallow: /
+
+# If you don't want this instance to be listed on https://privatebin.info/directory/
+# uncomment the following lines:
+#User-agent: PrivateBinDirectoryBot
+#Disallow: /