major rework: made faster, cleaned up, obsolete code removed,

major rework: made faster, cleaned up, obsolete code removed,
the whole thing should be chucked and written from scratch

SCCS-vsn: usr.bin/mail/list.c 5.5
SCCS-vsn: usr.bin/mail/lex.c 5.5
SCCS-vsn: usr.bin/mail/collect.c 5.3
SCCS-vsn: usr.bin/mail/main.c 5.4
SCCS-vsn: usr.bin/mail/names.c 5.4
SCCS-vsn: usr.bin/mail/cmd3.c 5.4
SCCS-vsn: usr.bin/mail/Makefile 5.4
SCCS-vsn: usr.bin/mail/cmdtab.c 5.4
SCCS-vsn: usr.bin/mail/def.h 5.3
SCCS-vsn: usr.bin/mail/glob.h 5.2
SCCS-vsn: usr.bin/mail/aux.c 5.6
SCCS-vsn: usr.bin/mail/pathnames.h 5.3
SCCS-vsn: usr.bin/mail/cmd1.c 5.4
SCCS-vsn: usr.bin/mail/popen.c 5.3
SCCS-vsn: usr.bin/mail/send.c 5.3
SCCS-vsn: usr.bin/mail/vars.c 5.3
SCCS-vsn: usr.bin/fmt/fmt.c 5.4
SCCS-vsn: usr.bin/mail/rcv.h 5.2
SCCS-vsn: usr.bin/mail/tty.c 5.3
SCCS-vsn: usr.bin/mail/getname.c 5.3
SCCS-vsn: usr.bin/mail/strings.c 5.4
SCCS-vsn: usr.bin/mail/temp.c 5.3
SCCS-vsn: usr.bin/mail/v7.local.c 5.3
SCCS-vsn: usr.bin/mail/cmd2.c 5.4
SCCS-vsn: usr.bin/mail/local.h 5.2
SCCS-vsn: usr.bin/mail/edit.c 5.3
SCCS-vsn: usr.bin/mail/fio.c 5.5
SCCS-vsn: usr.bin/mail/head.c 5.3
SCCS-vsn: usr.bin/mail/optim.c 5.7