checked in for rick: add restart, size, modtime, newer, syst;

checked in for rick: add restart, size, modtime, newer, syst;
switch to binary if both sides are unix; ls uses LIST, (new) nlist uses NLST;
add default token to .netrc as wildcard machine

SCCS-vsn: usr.bin/ftp/cmds.c 5.13
SCCS-vsn: usr.bin/ftp/cmdtab.c 5.7
SCCS-vsn: usr.bin/ftp/domacro.c 1.6
SCCS-vsn: usr.bin/ftp/ftp.1 6.11
SCCS-vsn: usr.bin/ftp/ftp.c 5.23
SCCS-vsn: usr.bin/ftp/main.c 5.12
SCCS-vsn: usr.bin/ftp/ruserpass.c 1.7