windows-afsifs-20050804

windows-afsifs-20050804

addresses:
byte-range locks work (mildly tested)
fixes a reference counting error
can shutdown/restart client
code formatting
major speed improvements
fixes delete operation problem
internal locking in more places

i have reviewed this patch myself carefully.  specifically, please review
the changes to cm_buf.c and cm_callback.c.  in cm_buf, i added the looping
code because i ran into the following assert once.  i am not sure why, and
my attempt to diagnose the problem was not successful.

apart from the byte-range locking code, the code has not change for quite
a bit.