Jacob points out that changing TICKSPERSEC in unix.h changed the

Jacob points out that changing TICKSPERSEC in unix.h changed the
meaning of BellOverload{T,S} in Unix saved sessions. Add a Unix-
specific backwards compatibility wart to settings.c to compensate.
Of course when I do the serious config format revamp, I will ensure
that no config item depends on internal #defines (these time
intervals will be specified as a floating-point number of seconds)
and this horror will be relegated to the old-config-compatibility
code.

git-svn-id: http://svn.tartarus.org/sgt/putty@5080 cda61777-01e9-0310-a592-d414129be87e