(chdir) does not cd to home directory

[David Hull <dmh@tibco.com>]

Accordint to the manual, (chdir) with no argument should chdir to
home-directory.  It doesn't seem to.

% scsh
Scsh 0.4
> (cwd)
"/tmp/funny-file-names"
> (chdir)
> (cwd)
"/tmp/funny-file-names"
> home-directory
"/tss/home2/dmh"
> (chdir home-directory)
> (cwd)
"/tss/home2/dmh"

BTW, I can't seem to find any reference to fcntl(2) in the manual.  Is
this because it's not documented, or because it's not supported (e.g.,
non-POSIX), or because I'm not looking hard enough?

--dmh