+ add overloaded versions of HexStr(pointer) for i8086 near and far pointers
- rm ifdefs for i8086 far code memory model when doing stack traces. The
  compiler will now choose the correct overload of HexStr according to the
  CodePointer type.



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27163 3ad0048d-3df7-0310-abae-a5850022a9f2