ENHANCE: removed static build autodetection, which didn't work anyway.
Use an explicit, user-specified preprocessor variable instead.
ENHANCE: cleaned up the documentation a bit.
ENHANCE: added openpam_subst(3), allowing certain PAM items to be embedded
in strings such as prompts. Apply it to the prompts used by
pam_get_user(3) and pam_get_authtok(3).
ENHANCE: added support for the user_prompt, authtok_prompt and
oldauthtok_prompt module options, which override the prompts passed
by the module to pam_set_user(3) and pam_get_authtok(3).
ENHANCE: rewrote the policy parser to support quoted option values.
ENHANCE: added pamtest(1), a tool for testing modules and policies.
ENHANCE: added code to check the ownership and permissions of a module before
loading it.
ENHANCE: added / improved input validation in many cases, including the policy
file and some function arguments.