postfix.postinst fails due to missing update-inetd

During a dist. upgrade from edgy to feisty:

Setting up postfix (2.3.3-1build1) ...
/var/lib/dpkg/info/postfix.postinst: 176: update-inetd: not found
dpkg: error processing postfix (--configure):
 subprocess post-installation script returned error exit status 127
...
Errors were encountered while processing:
 postfix
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install. Trying to recover:
Setting up postfix (2.3.3-1build1) ...
/var/lib/dpkg/info/postfix.postinst: 176: update-inetd: not found
dpkg: error processing postfix (--configure):
 subprocess post-installation script returned error exit status 127
Errors were encountered while processing:
 postfix

Indeed update-inetd is absent. There is a man page for it, but the script/program doesn't exist on my system.

Researching turns up this change log entry for netbase showing that update-inetd was removed from the netbase package:

 netbase (4.27) unstable; urgency=medium
  * Depend on inet-superserver instead of openbsd-inetd and tcpd.
  * update-inetd moved to its own package.
  * etc-services: added suucp (4013), ggz (5688). (Closes: #383993, #388446)
  -- Marco d'Itri <email address hidden> Sun, 1 Oct 2006 23:19:40 +0200

Additionally inet-superserver (netkit-inetd) was separated from netbase (a while back) and the dependency from netbase removed:

 netbase (4.27ubuntu1) feisty; urgency=low

  * Merge from debian unstable, remaining changes:
    - drop dependency on inet superserver
  -- Scott James Remnant <email address hidden> Mon, 27 Nov 2006 13:33:44 +0000

apparently resulting in a system with no dependency on inetd, and thus no need for update-inetd.

It seems postfix.postinst should be updated to skip that step if there is no superserver package installed, or more specifically, no update-inetd package.

Workaround:
Comment out or delete line 176 of /var/lib/dpkg/info/postfix.postinst, then run:
sudo dpkg --configure postfix

See related bug mentioning postfix's dependency on inetd:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=212759

Note: the original reporter indicated the bug was in package 'postfix'; however, that package was not published in Baltix.