Ticket #48171 - remove-ds-admin.pl removes files in the rpm
    
    Description: remove-ds-admin.pl expects /etc/dirsrv/admin-serv/bakup
    contains the original config files from rpm to replace with.  If
    setup-ds-admin.pl fails for some reason, it quits without backing up
    the files.  In the case, remove-ds-admin.pl just removes the config
    files since there is no way to restore them.
    
    This patch moves the backup code before the operation that has a
    possibility to fail.  This allows setup-ds-admin.pl to create the
    backups even if the setup fails.
    
    Also, read_conf and update_conf in cgi-src40/config.c uses given path
    and file name instead of the generated full path which is set up an
    empty string if the file is not accessible or not a plain file.
    
    https://fedorahosted.org/389/ticket/48171
    
    Reviewed by rmeggins@redhat.com (Thank you, Rich!!)