Implement interface enumeration based on if_nameindex, based on a
suggestion by Michael Ost

- implemented hardware assisted breakpoints (new 'hbreak' command
  which behaves just as 'break' command)
- small improvements to break handling (saving hit xpoint across
  exception handling)
- fixed 'cont N' command for watchpoints

access instead of on the FILE_DELETE_ON_CLOSE flag (based on a patch
by Mike McCormack).

DrawTextExA/W should calculate a rectangle of zero height and width in
some cases of null or empty supplied strings. With conformance tests.

Improve the typelib marshaler traces for lazy developers like me who
don't want to grep for constants.

The hook thread field has been reused for win events, so it no longer
works for low-level hardward hooks. Use the owner field instead.

Fixed a couple of potential fd leaks.

Implement CreateTapePartition, EraseTape, GetTapeParameters,
GetTapePosition, GetTapeStatus, PrepareTape, SetTapeParameters,
SetTapePosition and WriteTapemark.

Add a few tests for this.

by Mike McCormack).