* debian/patches-applied/ubuntu-no-error-if-missingok: add a new, magic module option 'missingok' which will suppress logging of errors by libpam if the module is not found. * debian/local/common-{auth,password}, debian/libpam-runtime.postinst: Use the new 'missingok' option by default for pam_smbpass, to correct the problem of very loud logging introduced in the previous upload when libpam-smbpass is not installed. LP: #216990.