install approved copyright notice

install approved copyright notice

SCCS-vsn: usr.bin/mail/aux.c 5.11
SCCS-vsn: usr.bin/mail/cmd1.c 5.11
SCCS-vsn: usr.bin/mail/cmd2.c 5.7
SCCS-vsn: usr.bin/mail/cmd3.c 5.13
SCCS-vsn: usr.bin/mail/cmdtab.c 5.7
SCCS-vsn: usr.bin/mail/collect.c 5.10
SCCS-vsn: usr.bin/mail/def.h 5.13
SCCS-vsn: usr.bin/mail/edit.c 5.7
SCCS-vsn: usr.bin/mail/fio.c 5.9
SCCS-vsn: usr.bin/fmt/fmt.c 5.6
SCCS-vsn: usr.bin/mail/getname.c 5.5
SCCS-vsn: usr.bin/mail/glob.h 5.11
SCCS-vsn: usr.bin/mail/head.c 5.5
SCCS-vsn: usr.bin/mail/lex.c 5.14
SCCS-vsn: usr.bin/mail/list.c 5.8
SCCS-vsn: usr.bin/mail/local.h 5.4
SCCS-vsn: usr.bin/mail/main.c 5.16
SCCS-vsn: usr.bin/mail/names.c 5.10
SCCS-vsn: usr.bin/mail/popen.c 5.9
SCCS-vsn: usr.bin/mail/quit.c 5.9
SCCS-vsn: usr.bin/mail/rcv.h 5.4
SCCS-vsn: usr.bin/mail/send.c 5.12
SCCS-vsn: usr.bin/mail/strings.c 5.7
SCCS-vsn: usr.bin/mail/temp.c 5.7
SCCS-vsn: usr.bin/mail/tty.c 5.7
SCCS-vsn: usr.bin/mail/v7.local.c 5.6
SCCS-vsn: usr.bin/mail/pathnames.h 5.6
SCCS-vsn: usr.bin/mail/vars.c 5.5