Shift 6.2 released

CHANGES
- Added multi-threading of directory traversal
- Added multi-threading of attr preservation when external programs invoked
- Added --interval to dynamically adjust batch size around fixed frequency
- Added use of gzip index files to increase metadata read performance
- Added --no-silent to disable silent corruption detection
- Added ability to escape multiple lines over stdin in shift-aux
- Added syntax checking of numeric options that can take units
- Changed --files and --size to be minimums instead of absolutes
- Changed time remaining to more accurately reflect manager overhead
- Fixed remote host selection that was running per file instead of per batch
- Fixed detection of operations already performed by another client
- Fixed slow processing of doing logs due to small backward read size
- Fixed local/remote fadvise that had old initial implementation
- Fixed --no-recall handling of remote files
- Fixed possible exceptions during some thread joins
- Fixed Net::Ping exceptions when Time::HiRes not available
- Fixed exception when stat of remote file fails
- Fixed use of setfacl when shift-bin available
- Fixed run state when --restart=ignore ignores final operations
- Fixed manager --doing=n so it retrieves nth doing in past
- Fixed output of error table in stats due to tainted file names
- Fixed option abbreviation so deprecated options don't invoke other options
- Fixed double lustre striping during attribute preservation stage
- Fixed high memory utilization during traversal of very large directories
- Fixed stalls due to inadvertent newlines left in logs after restarts
- Fixed preservation of lustre striping due to bad conditional