Merge branch '4.1' of github.com:walkor/workerman into 4.1

Author: walkor

Connection/TcpConnection.php

@@ -160,7 +160,7 @@ class TcpConnection extends ConnectionInterface
     /**
      * Context.
      *
-     * @var array
+     * @var object|null
      */
     public $context = null;
 

Worker.php

@@ -34,7 +34,7 @@ class Worker
      *
      * @var string
      */
-    const VERSION = '4.1.4';
+    const VERSION = '4.1.5';
 
     /**
      * Status starting.
@@ -1557,6 +1557,7 @@ protected static function forkOneWorkerForLinux(self $worker)
         elseif (0 === $pid) {
             \srand();
             \mt_srand();
+            static::$_gracefulStop = false;
             if ($worker->reusePort) {
                 $worker->listen();
             }
@@ -1882,6 +1883,8 @@ public static function stopAll($code = 0, $log = '')
             } else {
                 $sig = \SIGINT;
             }
+            // Fix exit with status 2
+            usleep(50000);
             foreach ($worker_pid_array as $worker_pid) {
                 \posix_kill($worker_pid, $sig);
                 if(!static::$_gracefulStop){