Implement correct toggle of non-default charsets chars like german Umlaute

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If I understand correctly this is also true for wordlists (if wordlists are UTF8 and have Umlaute, optimized kernels will convert them to incorrect UTF-16LE, wouldn't they?)

Update: optimized ntlm kernel does indeed fail on Umlaut passwords from a password list and the pure (non-optimized) one succeeds