pam_sss: refactoring, use struct cert_auth_info Similar as in the PAM responder this patch replaces the individual certificate authentication related attributes by a struct which can be used as a list. With the pam_sss can handle multiple SSS_PAM_CERT_INFO message and place the data in individual list items. If multiple certificates are returned before prompting for the PIN a dialog to select a certificate is shown to the users. If available a GDM PAM extension is used to let the user choose from a list. All coded needed at runtime to check if the extension is available and handle the data is provided by GDM as macros. This means that there are no additional run-time requirements. Related to https://pagure.io/SSSD/sssd/issue/3560 Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com> Tested-by: Scott Poore <spoore@redhat.com>

PAM: Define compatible macros for some functions. Functions pam_vsyslog and pam_modutil_getlogin are not available in openpam. This patch conditionally define macros for these function if they are not available. Compatible macros use standard functions vsyslog, getlogin Reviewed-by: Sumit Bose <sbose@redhat.com>

CONFIGURE: Enhance detection of pam Reviewed-by: Sumit Bose <sbose@redhat.com>

Rename server/ directory to src/ Also update BUILD.txt