K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2018-03-27T14:55:01.271095Z
K 7
svn:log
V 307
MFV: libb2: use native calls for secure memory clearance

Drop our local patch and restore full vanilla upstream code in
contrib/libb2.

No functional change intended.  explicit_bzero() should continue to be used.

Obtained from:	libb2 b4b241a34824b51956a7866606329a065d397525
Sponsored by:	Dell EMC Isilon

END