- debian/control: add a versioned dependency on ldap-auth-config,
      to ensure pam-related consistency at all points.
    - debian/control: removed Build-Depends on po-debconf (debconf handled
      by ldap-auth-config now)
    - Removed the following files, due to use of ldap-auth-config:
      debian/config
      debian/libpam-ldap.postrm
      debian/po
      debian/templates