Allowing relative file imports

[Sean Kelly]

== Quote from Jarrett Billingsley (jarrett.billingsley at gmail.com)'s article
> On Fri, Mar 27, 2009 at 2:14 PM, Walter Bright
> <newshound1 at digitalmars.com> wrote:
> >
> > I'm also thinking of adjusting the code generation to reduce the ability to
> > take advantage of buffer overflows, even though you shouldn't have buffer
> > overflows in D.
> At least not in debug mode.  ;)

Correction: at least not in non-release mode.  That "release" flag really has to
be renamed.