DEVEL15-windows-buffer-mgmt-20070204

DEVEL15-windows-buffer-mgmt-20070204

Instead of using a fixed sized hashtable of 1024 entries regardless
of the number of buffers, compute the hashtable to be large enough
for on average 7 buffers per bucket.

Remove the 'size' field from cm_buf_t since it is never used.

Add more info to the output of cm_buf_t objects when using "fs memdump"

(cherry picked from commit cec0b902f6cbeb849984d5ca1ef1847ef1eeac89)