kes Change Bacula trademark owner from John Walker to Kern Sibbald

kes  First non-working cut of vbackup
kes  Correct FD heartbeat code to use volatile variable accessed by
     two threads.
kes  Zero thread id with memset if on Win32 in case it is a struct.
kes  If cannot create JobMedia record, continue to try to write eof
     and clean up in block.c