K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2018-08-29T02:18:13.482086Z
K 7
svn:log
V 580
MFC r337505, r337865, r337869: dd status=progress

r337505:
dd: add status=progress support

This reports the current status on a single line every second, mirroring
similar functionality in GNU dd, and carefully interacts with SIGINFO.

PR:		229615

r337865:
dd: Incorporate some changes from imp for status=progress

Notable changes from what landed in r337505:
- sigalarm handler isn't setup unless we're actually using it
- Humanized versions of the amount of data transferred in the progress
  update

r337869:
dd(1): Kill off duplicate progress definition following r337865

END