Fixed kerberos path again. Default Ubuntu installs do indeed use /var/lib/krb5kdc. Really should try to autodetect that.
#
# LDAP Public Key Patch schema for use with openssh-ldappubkey
# Author: Eric AUGE <eau@phear.org>
#
# Based on the proposal of : Mark Ruijter
#
# octetString SYNTAX
attributetype ( 1.3.6.1.4.1.24552.500.1.1.1.13 NAME 'sshPublicKey'
DESC 'MANDATORY: OpenSSH Public key'
EQUALITY octetStringMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 )
# printableString SYNTAX yes|no
objectclass ( 1.3.6.1.4.1.24552.500.1.1.2.0 NAME 'ldapPublicKey' SUP top AUXILIARY
DESC 'MANDATORY: OpenSSH LPK objectclass'
MAY ( sshPublicKey $ uid )
)