Two debugging patches.

Two debugging patches.
The first allows to hold symbolic switches in $^D
and more generally fixes assignment to $^D. The
second one improves the information given by -Dl.

Subject: [PATCH] allow $^D = "flags"
Date: Fri, 27 Jun 2003 22:26:24 +0100
Message-ID: <20030627212624.GB12887@fdgroup.com>

Subject: [PATCH] make -Dl show more scope info
From: Dave Mitchell <davem@fdgroup.com>
Date: Fri, 27 Jun 2003 23:00:36 +0100
Message-ID: <20030627220036.GC12887@fdgroup.com>

p4raw-id: //depot/perl@19870