Calling pj_sock_getsockname() on a newly accepted socket may fail if IOCP ioqueue backend is used (thanks Christian Gan for for report)

[bennylp]

The pj_sock_getsockname() call fails probably because SO_UPDATE_ACCEPT_CONTEXT socket option had not been set yet after the socket is accepted. Note that it has been called in pj_sock_accept(), although this call may not do anything useful since the socket is not accepted yet.

[ming]

​http://codereview.teluu.com/264193/show

[nanang]

In r3051:

• Moved setsockopt(SO_UPDATE_ACCEPT_CONTEXT) from pj_sock_accept() to ioqueue_on_accept_complete().
• Added setsockopt(SO_UPDATE_ACCEPT_CONTEXT) in pj_sock_accept() for new accepted socket when immediate connection is available.
• Added pj_sock_getsockname() check in unit test ioq_tcp.c for new accepted socket.