some lint, some bug fixes, ^C handling improvements

some lint, some bug fixes, ^C handling improvements
multiple access methods back in (yeeech!)
new version from Rodney Ruddock (rodney@snowhite.cis.uoguelph.ca)

SCCS-vsn: contrib/ed/Makefile 5.2
SCCS-vsn: contrib/ed/add_line.c 5.3
SCCS-vsn: contrib/ed/address.c 5.3
SCCS-vsn: contrib/ed/bang.c 5.3
SCCS-vsn: contrib/ed/c.c 5.3
SCCS-vsn: contrib/ed/d.c 5.3
SCCS-vsn: contrib/ed/e.c 5.3
SCCS-vsn: contrib/ed/ed.1 5.2
SCCS-vsn: contrib/ed/ed.h 5.3
SCCS-vsn: contrib/ed/edhup.c 5.3
SCCS-vsn: contrib/ed/equal.c 5.3
SCCS-vsn: contrib/ed/extern.h 5.2
SCCS-vsn: contrib/ed/f.c 5.3
SCCS-vsn: contrib/ed/filename.c 5.3
SCCS-vsn: contrib/ed/g.c 5.3
SCCS-vsn: contrib/ed/get_line.c 5.3
SCCS-vsn: contrib/ed/get_pattern.c 5.3
SCCS-vsn: contrib/ed/i.c 5.3
SCCS-vsn: contrib/ed/input_lines.c 5.3
SCCS-vsn: contrib/ed/j.c 5.3
SCCS-vsn: contrib/ed/k.c 5.3
SCCS-vsn: contrib/ed/l.c 5.3
SCCS-vsn: contrib/ed/line_number.c 5.3
SCCS-vsn: contrib/ed/m.c 5.3
SCCS-vsn: contrib/ed/main.c 5.3
SCCS-vsn: contrib/ed/p.c 5.3
SCCS-vsn: contrib/ed/q.c 5.3
SCCS-vsn: contrib/ed/r.c 5.3
SCCS-vsn: contrib/ed/re.c 5.3
SCCS-vsn: contrib/ed/rol.c 5.3
SCCS-vsn: contrib/ed/search.c 5.3
SCCS-vsn: contrib/ed/sub.c 5.3
SCCS-vsn: contrib/ed/t.c 5.3
SCCS-vsn: contrib/ed/u.c 5.3
SCCS-vsn: contrib/ed/w.c 5.3
SCCS-vsn: contrib/ed/z.c 5.3