Relevant BUGIDs:

Relevant BUGIDs:

Purpose of commit: new feature

Commit summary:
---------------
        * modules/pam_limits/Makefile.am: Define limits.d dir and install it.
        * modules/pam_limits/pam_limits.8.xml: Describe limits.d parsing.
        * modules/pam_limits/pam_limits.c (pam_limit_s): Make conf_file ptr.
        (pam_parse): conf_file is now ptr.
        (pam_sm_open_session): Add parsing files from limits.d subdir using
        glob, change pl to pointer.