FIXED: C shell bug

[utzoo!decvax!ucbvax!dist2]

	The "&&" and "||" command operators (as opposed to expression operators)
	in the C shell have their senses reversed.

For consistency with the 4.1BSD version of the C shell, the fix included is
different from the one suggested:

	diff	sh.sem.c.old sh.sem.c
	280c280
	< 		if ((getn(value("status")) == 0) == (t->t_dtyp == TAND))
	---
	> 		if ((getn(value("status")) == 0) != (t->t_dtyp == TAND))

	As far as I know, this bug still exists on both the 2.8 and 4.1 bsd's.

This fix should be applied to all tapes made before 10/5/81.  The bug does not
exist in 4.1BSD.

			Carl