Partial work updating epoll reimplentation.

src/include/janet.h

@@ -628,7 +628,7 @@ struct JanetListenerState {
     void *tag; /* Used to associate listeners with an overlapped structure */
     int bytes; /* Used to track how many bytes were transfered. */
 #else
-    uint32_t index; /* Used for poll implentation */
+    uint32_t index; /* Used for poll/epoll implentation */
 #endif
 };
 #endif