Got rid of the Thread.yield TODO

src/main/java/ru/puzpuzpuz/http/util/OptimisticLock.java

@@ -14,7 +14,7 @@ public final class OptimisticLock {
     public void lock() {
         while (!tryLock()) {
             // keep the loop
-            // TODO consider using Thread.yield() here to avoid core starvation
+            Thread.yield(); // avoiding CPU core starvation
         }
     }