nssov overlay is missing

it appears that in 2.4.23-0ubuntu3, the nssov overlay is absent from the package. this was not the case in the previous version (2.4.21-0ubuntu5.2). the following files are missing:

/usr/lib/ldap/nssov.la
/usr/lib/ldap/nssov.so
/usr/lib/ldap/nssov.so.0
/usr/lib/ldap/nssov.so.0.0.0

this severely breaks installations that were using the overlay, as it is referenced from the config, but cannot be loaded, resulting in dpkg failing and completely breaking the upgrade process:

Setting up slapd (2.4.23-0ubuntu3.2) ...
  Backing up /etc/ldap/slapd.d/ in /var/backups/slapd-2.4.21-0ubuntu5.3... done.
  Moving old database directories to /var/backups:
  Loading from /var/backups/slapd-2.4.21-0ubuntu5.3:
  - directory dc=example,dc=com... failed.

Loading the database from the LDIF dump failed with the following
error while running slapadd:
    lt_dlopenext failed: (nssov) file not found
    config error processing cn=module{0},cn=config: <olcModuleLoad> handler exited with 1
    slapadd: bad configuration directory!
dpkg: error processing slapd (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 slapd
E: Sub-process /usr/bin/dpkg returned an error code (1)

1) >lsb_release -rd
Description: Ubuntu 10.10
Release: 10.10

2) >apt-cache policy slapd
slapd:
  Installed: 2.4.23-0ubuntu3.2
  Candidate: 2.4.23-0ubuntu3.2
  Version table:
 *** 2.4.23-0ubuntu3.2 0
        500 http://us.archive.ubuntu.com/ubuntu/ maverick-updates/main i386 Packages
        100 /var/lib/dpkg/status
     2.4.23-0ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages

3) i expected the nssov overlay to load

4) it did not, causing slapd to fail, which in turn caused dpkg to fail.