In htgroupsplugin/trunk/README.txt some configuration examples show long depreciated and soon removed options from AccountManagerPlugin:
- 'password_format' has been obsoleted by
- 'password_store' for direct store selection including store chaining and
- store-specific options for hash type selection, i.e.:
- 'htpasswd_hash_type' for HtPasswdStore
- 'db_htpasswd_hash_type' for SessionStore with IPasswordHashMethod HtPasswdHashMethod (selected by 'hash_method' in turn)
- 'password_file' has been depreciated in favor of store-specific options, once more to allow for seamless store chaining
- 'htpasswd_file' for HtPasswdStore's password file in htpasswd format
- 'htdigest_file' for HtDigestStore's password file in htdigest format
Please update the documentation, and maybe the plugin reading these options as well (unchecked). The AccountManagerPlugin supports only Trac versions down to 0.11, so the existing 0.9 branch of HtgroupsPlugin is not relevant here.