make importing SHELL

[Doug Gwyn]

In article <4147 at bsu-cs.UUCP> dhesi at bsu-cs.UUCP (Rahul Dhesi) writes:
>In article <13753 at mimsy.UUCP> chris at mimsy.UUCP (Chris Torek) writes:
>>More generally, the problem is that the environment variable $SHELL has
>>the meaning `user's preferred shell'...
>I think the problem is that $SHELL exists at all.  It's a poor
>substitute for the #! in 4.3BSD.

So far as I know, no shell uses the SHELL environment variable
to determine what shell to use when "exec"ing a shell script.

SHELL is used when setting up a new layer or window, etc.