[XeTeX] Hyperref \hyperlink and \hypertarget not working with accented characters

[Arthur Reutenauer]

> BOM is already used in outlines but the application that creates PDF
> has to write BOM. As Arthur wrote, there are a lot of files in UTF-8
> that do not have BOM. Even in XML BOM is only optional.

  Actually, it even used to be frowned upon in UTF-8 text :-)  It was
originally meant for tagging byte order (as the name hints) in strings
encoded using UCS-2 in native byte order, and was useless for that
purpose in UTF-8, that always has the most significant byte first.

	Arthur