* Use exponential backoff for SHUTDOWN and SHUTDOWN-ACK retransmission   timer. * While there, do some cleanups.
* Use exponential backoff for SHUTDOWN and SHUTDOWN-ACK retransmission
  timer.
* While there, do some cleanups.

tosakanth/sctp-refimpl,sdd330/sctp-refimpl,deepak899/sctp-refimpl,tosakanth/sctp-refimpl,xwhuang/sctp-refimpl,sdd330/sctp-refimpl,sctplab/sctp-refimpl,TopPano/sctp-refimpl,gale320/sctp-refimpl,TopPano/sctp-refimpl,xwhuang/sctp-refimpl,sctplab/sctp-refimpl,TopPano/sctp-refimpl,sdd330/sctp-refimpl,TopPano/sctp-refimpl,gale320/sctp-refimpl,gale320/sctp-refimpl,gale320/sctp-refimpl,sdd330/sctp-refimpl,xwhuang/sctp-refimpl,timsuchanek/sctp-refimpl,gale320/sctp-refimpl,deepak899/sctp-refimpl,timsuchanek/sctp-refimpl,deepak899/sctp-refimpl,deepak899/sctp-refimpl,gale320/sctp-refimpl,sdd330/sctp-refimpl,timsuchanek/sctp-refimpl,sdd330/sctp-refimpl,timsuchanek/sctp-refimpl,gale320/sctp-refimpl,sctplab/sctp-refimpl,timsuchanek/sctp-refimpl,gale320/sctp-refimpl,xwhuang/sctp-refimpl,sctplab/sctp-refimpl,TopPano/sctp-refimpl,xwhuang/sctp-refimpl,sdd330/sctp-refimpl,gale320/sctp-refimpl,timsuchanek/sctp-refimpl,sctplab/sctp-refimpl,tosakanth/sctp-refimpl,TopPano/sctp-refimpl,tosakanth/sctp-refimpl,sdd330/sctp-refimpl,tosakanth/sctp-refimpl,tosakanth/sctp-refimpl,deepak899/sctp-refimpl,TopPano/sctp-refimpl,sctplab/sctp-refimpl,timsuchanek/sctp-refimpl,xwhuang/sctp-refimpl,timsuchanek/sctp-refimpl,timsuchanek/sctp-refimpl,sdd330/sctp-refimpl,tosakanth/sctp-refimpl,tosakanth/sctp-refimpl,TopPano/sctp-refimpl,tosakanth/sctp-refimpl,deepak899/sctp-refimpl,TopPano/sctp-refimpl