enforce maximum capacity

src/service/rate_limiting/mod.rs

@@ -89,8 +89,14 @@ impl Service {
                 if *capacity >= limit.burst_capacity.get() {
                     return Err(gap);
                 } else {
+                    let zero_capacity = *capacity == 0;
                     *capacity += 1;
-                    // TODO: update thing
+
+                    // Ensures that the update point is in the future
+                    if zero_capacity {
+                        *instant = Instant::now()
+                    }
+
                     *instant += gap;
                 }
             }