K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2017-11-04T10:52:58.579286Z
K 7
svn:log
V 174
C++17 requires quick_exit(3) to be async-signal safe.

Make it safe, and update man page with the useful information.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

END