Added rate limiting and settings fixes.

example-config.ini

@@ -31,3 +31,14 @@ domain = https://search.example.com
 # Use *,-engine to exclude specific engines (e.g., *,-startpage)
 # Available engines: ddg, startpage, yahoo, mojeek
 engines="*"
+
+[rate_limit]
+# Rate limit searches per interval
+
+# /search
+#search_requests = 10
+#search_interval = 60
+
+# /images
+#images_requests = 20
+#images_interval = 60