tcp: Disable killing of time_wait sockets in tcp_nuke_addr

tcp_nuke_addr removes all sockets in TCP state CONNECTED
and TIME_WAIT by parsing a hash list of sockets.
When parsing through this list, accessing TIME_WAIT sockets
leads to a crash since the sk meta data is probably not valid.

Fix this by bypassing TIME_WAIT sockets in tcp_nuke_addr.

Change-Id: Iafe9fafd406f1afe97f02cc55095ceb5bd3b4722
Signed-off-by: Se Wang Oh <sewango@codeaurora.org>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>