Add copyright

Add copyright

SCCS-vsn: games/canfield/canfield/canfield.c 5.1
SCCS-vsn: games/canfield/cfscores/cfscores.c 5.1
SCCS-vsn: games/fish/fish.c 5.1
SCCS-vsn: games/primes/primes.c 5.1
SCCS-vsn: games/rain/rain.c 5.1
SCCS-vsn: games/worm/worm.c 5.1
SCCS-vsn: games/worms/worms.c 5.1
SCCS-vsn: old/games.vax/aard/Makefile 5.1
SCCS-vsn: games/backgammon/backgammon/Makefile 5.1
SCCS-vsn: games/backgammon/common_source/allow.c 5.1
SCCS-vsn: games/backgammon/common_source/board.c 5.1
SCCS-vsn: games/backgammon/common_source/check.c 5.1
SCCS-vsn: games/backgammon/teachgammon/data.c 5.1
SCCS-vsn: games/backgammon/backgammon/extra.c 5.1
SCCS-vsn: games/backgammon/common_source/fancy.c 5.1
SCCS-vsn: games/backgammon/common_source/init.c 5.1
SCCS-vsn: games/backgammon/backgammon/main.c 5.1
SCCS-vsn: games/backgammon/backgammon/move.c 5.1
SCCS-vsn: games/backgammon/common_source/odds.c 5.1
SCCS-vsn: games/backgammon/common_source/one.c 5.1
SCCS-vsn: games/backgammon/common_source/save.c 5.1
SCCS-vsn: games/backgammon/common_source/subs.c 5.1
SCCS-vsn: games/backgammon/common_source/table.c 5.1
SCCS-vsn: games/backgammon/teachgammon/teach.c 5.1
SCCS-vsn: games/backgammon/backgammon/text.c 5.1
SCCS-vsn: games/backgammon/teachgammon/ttext1.c 5.1
SCCS-vsn: games/backgammon/teachgammon/ttext2.c 5.1
SCCS-vsn: games/backgammon/teachgammon/tutor.c 5.1
SCCS-vsn: games/backgammon/common_source/back.h 5.1
SCCS-vsn: games/backgammon/teachgammon/tutor.h 5.1
SCCS-vsn: games/backgammon/backgammon/Mesgfix 5.1