<1112163342.018492.101240@f14g2000cwb.googlegroups.com> on

<1112163342.018492.101240@f14g2000cwb.googlegroups.com> on
comp.security.ssh contains a Dr Watson log which looks to me as if
`unclean-close-crash' occurred due to a rekey timer going off after
the session had closed. Hence, ssh2_timer() now avoids doing
anything if the session is already closed, and also ssh_do_close()
proactively calls expire_timer_context(). Between those I think they
ought to solve the problem.

git-svn-id: svn://svn.tartarus.org/sgt/putty@5564 cda61777-01e9-0310-a592-d414129be87e