K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-08-29T19:33:07.477709Z
K 7
svn:log
V 256
Restore the requirement of setting errno to zero before calling
ptrace(2).  Describe the behaviour of automatically zeroing errno as
historical feature.

Requested by:	ache, jhb
Reviewed by:	ache, bjk
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

END