Add in a heuristic for finding the correct DTB on recent Win10.

This removes again the single_page_map_offset configuration value,
and requires that a full/correct config be used to supply a manual DTB
value.

The expectation is that the single_page_map_offset feature be
re-introduced but override *all* scanning (so the scanning doesn't take
place even if the stacking does).

volatility/cli/__init__.py

@@ -84,7 +84,6 @@ class CommandLine(object):
         else:
             ctx.config["automagic.general.single_location"] = "file://" + os.path.abspath(args.file)
             pass
-        # ctx.config["automagic.general.single_page_map_offset"] = 0x1ab000
 
         ###
         # BACK TO THE FRAMEWORK