kes More bat implementation.

kes  File migrate bug with Pool Occupancy using mediaid instead
     of jobids.  Fixes bug #795.
kes  Fix orphaned buffers in filed backup and verify due to
     crypto buffers not freed during errors.  Fixes bug #789.
kes  Extend new GUI api code to tree commands.
kes  Ensure that tree and dot commands check console ACLs.
kes  Permit marking directory with trailing slash.
kes  Allow 20 console connections (instead of only 10).