Allow opening arbitrary ports in openldap::packetfilter

Signed-off-by: Samuli Seppänen <samuli@openvpn.net>
Added DB_LOG_AUTOROTATE configuration to database.erb

Previously BDB accumulated transaction log files indefinitely consuming large
amounts of diskspace. This was particularly painful and useless when migrating
the LDAP databases. Added DB_LOG_AUTOROTATE to slapd.conf database configuration
fragments. This means that "disastrous recovery" is not possible anymore, so
please ensure your backups are in good order.

Signed-off-by: Samuli Seppänen <samuli@openvpn.net>