Bug with TCP server socket in IOCP ioqueue and active socket causes the ioqueue to stop accepting incoming TCP connections or 100% CPU usage

[bennylp]

Symptom:

1. When asynchronous accept() is called from inside on_accept_complete(), the !IOCompletionPort ioqueue will no longer be able to report incoming TCP connections.
2. When TCP connection receives ECONNRESET, the active socket goes into tight loop that causes 100% CPU usage. This happens with select() ioqueue
3. Premature TCP connection closure: immediate data in recv() will cause the active socket to incorrectly thinks that the connection has been closed

[bennylp]

Fixed in r2240

[bennylp]

In r2246:

• Fixed the 100% CPU usage when TCP active socket receives ECONNRESET

[bennylp]

In r2248:

• immediate data in recv() will cause the active socket to incorrectly thinks that the connection has been closed