Bug in csh (system 5 and system 3)

[Guy Harris]

Well, AT&T didn't supply "csh" with S3, nor with any S5 release prior to
S5R4, so "system 5 and system 3" really means "somebody's S3-based and
S5-based releases, with a 'csh' from somewhere".  In at least some
cases, the "somewhere" is a source of a rather old version of "csh" with
plenty of other problems.

The SunOS 4.0.3 version (derived from the 4.3BSD version, so I suspect
any 4.3BSD-derived version and maybe any 4.xBSD-derived version acts the
same) did:

	auspex% echo foo\
	bar
	foo bar
	auspex% echo 'foo\
	bar'
	foo
	bar
	auspex%

so I suspect the only "real" S5 "csh", namely the one coming in S5R4
which will be derived from, I suspect, the SunOS 4.1 one (since that one
should, last I heard, not use the 8th bit of characters for quoting),
may do the same thing.