tls_wrap: Unlink TLSWrap and SecureContext objects asap.

Author: ChALkeR

lib/_tls_wrap.js

@@ -289,15 +289,22 @@ TLSSocket.prototype._wrapHandle = function(handle) {
     }
   });
 
-  this.on('close', this._destroySSL);
+  this.on('close', function() {
+    this._destroySSL();
+    res = null;
+  });
 
   return res;
 };
 
 TLSSocket.prototype._destroySSL = function _destroySSL() {
+  if (!this.ssl) return;
   this.ssl.destroySSL();
-  if (this.ssl._secureContext.singleUse)
+  if (this.ssl._secureContext.singleUse) {
     this.ssl._secureContext.context.close();
+    delete this.ssl._secureContext.context;
+  }
+  delete this.ssl;
 };
 
 TLSSocket.prototype._init = function(socket, wrap) {