RE: A couple items on TODO

> > As I was browsing TODO, I noticed a couple unassigned items
> that I may be
> > able to help with (I haven't worked with the source before):
> >
> > *Add use of 'const' for variables in source tree
>
> I would discuss this item with the hackers list and see exactly what
> people want done with it.

I have noticed while working on command.c and heap.c that half the functions
pass 'const char *' and the other half pass just 'char *'.  This is a pain
when you have a little helper function like 'is_relation(char *)' and you
want to pass a 'const char *' to it and vice versa.  ie. Compiler warnings -
it's sort of annoying.

Chris