http2: avoid unnecessary closure

lib/internal/http2/core.js

@@ -647,6 +647,21 @@ function submitShutdown(options) {
   }
 }
 
+function finishSessionDestroy(socket) {
+  if (!socket.destroyed)
+    socket.destroy();
+
+  // Destroy the handle
+  const handle = this[kHandle];
+  if (handle !== undefined) {
+    handle.destroy();
+    debug(`[${sessionName(this[kType])}] nghttp2session handle destroyed`);
+  }
+
+  this.emit('close');
+  debug(`[${sessionName(this[kType])}] nghttp2session destroyed`);
+}
+
 // Upon creation, the Http2Session takes ownership of the socket. The session
 // may not be ready to use immediately if the socket is not yet fully connected.
 class Http2Session extends EventEmitter {
@@ -919,27 +934,14 @@ class Http2Session extends EventEmitter {
 
     // Disassociate from the socket and server
     const socket = this[kSocket];
-    socket.pause();
+    // socket.pause();
     delete this[kSocket];
     delete this[kServer];
 
     state.destroyed = true;
     state.destroying = false;
 
-    setImmediate(() => {
-      if (!socket.destroyed)
-        socket.destroy();
-
-      // Destroy the handle
-      const handle = this[kHandle];
-      if (handle !== undefined) {
-        handle.destroy();
-        debug(`[${sessionName(this[kType])}] nghttp2session handle destroyed`);
-      }
-
-      this.emit('close');
-      debug(`[${sessionName(this[kType])}] nghttp2session destroyed`);
-    });
+    setImmediate(finishSessionDestroy.bind(this, socket));
   }
 
   // Graceful or immediate shutdown of the Http2Session. Graceful shutdown