Bugfix: Initialize the CHAP-Password with an empty string
Bugfix: Initialize the CHAP-Password with an empty string

Otherwise, since CHAP-Password is an octet type, having a password that
begins with "0X" will cause problems ("pairmake: Non-hex characters at
..."). Since we copy over the real password anyway one line later and
properly CHAP-scramble it, we can simply start with an "empty" password
to initialize the attribute.

Feh/libradauth