kes Implement new prunning code that prunes up to 1000 jobs at

     the same time.  The same technique can be applied to a number
     of other prune/purge subroutines.
kes  Add an insanity check when starting a new tape job to ensure
     that the tape position has not been changed. If so fail the
     job.
kes  Fix Win32 build for dlls to add the folllowing:
     src/lib/bsock.c -- new file with new entry points
     src/lib/dlist.c  -- new entry points
     src/cats/sql_create.c -- new entry point
     src/cats/sql_cmds.c -- new DATA item exported