From: Vlad Yasevich <redacted>
Date: Fri, 19 Dec 2008 20:47:50 -0500

From: Wei Yongjun <redacted>

Implement socket option SCTP_GET_ASSOC_NUMBER of the latest ietf socket
extensions API draft.

  8.2.5.  Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)

   This option gets the current number of associations that are attached
   to a one-to-many style socket.  The option value is an uint32_t.

Signed-off-by: Wei Yongjun <redacted>
Signed-off-by: Vlad Yasevich <redacted>

Applied.