: Misc Bugfixes

While working on something else in DCCP, I noted several bugs, most of these introduced by me. The present patch set fixes these.

Patch #1: Fixes sequence number wrap-around problems.

Patch #2: Fixes overwriting of Reset codes in dccp_v{4,6}_conn_request

Patch #3: Updates Ack Vector / Elapsed Time processing wrt RFC 4340.

Patch #4: Maps the PASSIVE_1 auxiliary state onto TCP_CLOSE_WAIT, since
otherwise inet_accept will complain.

Patch #5: A fix for the Request/Response RTT sampling: I forgot that option
processing can take time, which got factored into the RTT value (see patch for full details). Fixed by taking the timestamp earlier (but not at the interface :).
Arnaldo, I would like to submit this one with regard to 2.6.24 and to make things simpler I would like to merge this update with the earlier patch - I hope that this is ok - will put it into the test tree.