German "umlauts" in passphrase

[David Picon Alvarez]

It's possible to use non-7-bit-ascii characters for the passphrase, but
there can be issues with character sets when changing from machine to
machine, OS to OS, or on different revs of an OS depending on locale
settings. Personally I'd advice using oe instead of ö just in case, although
if you're careful of character sets and such you should be able to get it
working right.

--David.