Shift 6.3 released

CHANGES
- Fixed erroneous crontab entries for extra clients when --clients > 1
- Fixed slash prepended to relative paths during tar creation
- Fixed Tie::DB_FileLock exceptions that can abort manager updates
- Fixed tainted file names preventing manager synchronization
- Fixed missing lock during writes of user mount db
- Fixed use of dequeue_timed preventing directory traversal in older perls
- Fixed double locks causing deadlock during manager synchronization
- Fixed thread race condition resulting in zombie shift-aux chattr processes
- Fixed rounding of lustre stripe count causing allocated stripes off by 1
- Fixed potential noop in shift-aux chattr when thread creation fails
- Fixed stalls due to deletion of local mount information during restarts
- Fixed asymmetric fish-tcp performance during some wan scenarios
- Fixed potential duplicate error messages in various transports
- Fixed duplication of corrupt byte ranges resulting in negative rates/sizes
- Fixed infinite retry of corruption rectification when no progress made
- Fixed missing write error handling in fish and fish-tcp transports
- Fixed metadata counts during tar creation renames with --restart=ignore
- Fixed bad newline handling in shift-aux escape/unescape commands