Revision 306981

MFC r306600:
dump(8) first appeared in V4 UNIX
http://minnie.tuhs.org/cgi-bin/utree.pl?file=V4/man/man8

PR:             212444
Approved by:    bcr (mentor)
Obtained from:  TUHS
Differential Revision:  https://reviews.freebsd.org/D8105