[Rspamd] Add missing ratelimit.conf

data/conf/rspamd/override.d/ratelimit.conf

@@ -0,0 +1,14 @@
+rates {
+    # Format: "1 / 1h" or "20 / 1m" etc. - global ratelimits are disabled by default
+    to = "100 / 1s";
+    to_ip = "100 / 1s";
+    to_ip_from = "100 / 1s";
+    bounce_to = "100 / 1s";
+    bounce_to_ip = "100 / 1s";
+    user = "100 / 1s";
+}
+whitelisted_rcpts = "postmaster,mailer-daemon";
+max_rcpt = 5;
+custom_keywords = "/etc/rspamd/custom/ratelimit.lua";
+user_keywords = ["user", "customrl"];
+dynamic_rates = { customrl = "customrl"}