aken: add provision for copying physical memory (safer than mapping)
acpi uses that to avoid problems due to nonaligned ACPI tables (bonus:
wastes less memory)
wdbg: remove unnecessary headers
wseh: add comments
wstartup: fix return type (since we're now called by _initterm_e)
This was SVN commit r5159.
move exception-specific stuff into wseh. it now grabs the entry point
and wraps it in a __try block (but only for the main EXE).
this works around issues with the previous SEH registration code
(exceptions weren't caught in release mode when not running in debugger)
This was SVN commit r5151.