I just released version 0.4 of PAM_Extern, a PAM plugin that executes another program/script and uses its return value to authenticate a user. The theory behind that is that while a lot of people might be able to create authentication schemes, few are are able to do so using C and the PAM library.

Magnus Bergman contributed all changes in this release:
- fixes compilation with Linux-PAM
- if pam_extern doesn't get a password, it asks for it
- internal rearrangements: token1 and token2 renamed to username and password respectively, change C++ comment style to C comment style

Thanks, Magnus!

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