Research V7 development

Research V7 development
Work on file usr/man/man5/acct.5
Work on file usr/man/man5/a.out.5
Work on file usr/man/man5/dir.5
Work on file usr/man/man5/ar.5
Work on file usr/man/man5/core.5
Work on file usr/man/man5/dump.5
Work on file usr/man/man5/passwd.5
Work on file usr/man/man5/filsys.5
Work on file usr/man/man5/tp.5
Work on file usr/man/man5/utmp.5
Work on file usr/man/man5/types.5
Work on file usr/man/man5/group.5
Work on file usr/man/man5/environ.5
Work on file usr/man/man5/plot.5
Work on file usr/man/man5/mtab.5
Work on file usr/man/man5/ttys.5
Work on file usr/man/man6/bcd.6
Work on file usr/man/man6/backgammon.6
Work on file usr/man/man6/arithmetic.6
Work on file usr/man/man6/banner.6
Work on file usr/man/man6/bj.6
Work on file usr/man/man6/chess.6
Work on file usr/man/man6/ching.6
Work on file usr/man/man6/cubic.6
Work on file usr/man/man6/words.6
Work on file usr/man/man6/maze.6
Work on file usr/man/man6/moo.6
Work on file usr/man/man6/quiz.6
Work on file usr/man/man6/ttt.6
Work on file usr/man/man6/reversi.6
Work on file usr/man/man6/wump.6
Work on file usr/man/man6/checkers.6
Work on file usr/man/man7/man.7
Work on file usr/man/man7/ascii.7

Co-Authored-By: Dennis Ritchie <dmr@research.uucp>
Synthesized-from: v7