update copyright

COPYING

src/66/66-all.c

src/66/66-dbctl.c

src/66/66-disable.c

src/66/66-enable.c

src/66/66-info.c

src/66/66-init.c

src/66/66-scandir.c

src/66/66-start.c

src/66/66-stop.c

src/66/66-svctl.c

src/66/66-tree.c

src/extra-tools/66-envfile.c

src/extra-tools/execl-cmdline.c

src/include/66/66.h

src/include/66/backup.h

src/include/66/constants.h

src/include/66/db.h

src/include/66/enum.h

src/include/66/graph.h