/usr/share/kde4/apps/kconf_update/ is in kmail 4:4.13.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kde4/apps/kconf_update/kmail-3.1-update-new-mail-notification-settings.pl
/usr/share/kde4/apps/kconf_update/kmail-3.1-use-UOID-for-identities.pl
/usr/share/kde4/apps/kconf_update/kmail-3.1.4-dont-use-UOID-0-for-any-identity.pl
/usr/share/kde4/apps/kconf_update/kmail-3.2-misc.sh
/usr/share/kde4/apps/kconf_update/kmail-3.2-update-loop-on-goto-unread-settings.sh
/usr/share/kde4/apps/kconf_update/kmail-3.3-aegypten.pl
/usr/share/kde4/apps/kconf_update/kmail-3.3-misc.pl
/usr/share/kde4/apps/kconf_update/kmail-3.3-move-identities.pl
/usr/share/kde4/apps/kconf_update/kmail-3.3-split-sign-encr-keys.sh
/usr/share/kde4/apps/kconf_update/kmail-3.3-use-ID-for-accounts.pl
/usr/share/kde4/apps/kconf_update/kmail-3.3b1-misc.pl
/usr/share/kde4/apps/kconf_update/kmail-3.4-misc.pl
/usr/share/kde4/apps/kconf_update/kmail-3.4.1-update-status-filters.pl
/usr/share/kde4/apps/kconf_update/kmail-3.5-trigger-flag-migration.pl
/usr/share/kde4/apps/kconf_update/kmail-4.0-misc.pl
/usr/share/kde4/apps/kconf_update/kmail-pgpidentity.pl
/usr/share/kde4/apps/kconf_update/kmail-upd-identities.pl
/usr/share/kde4/apps/kconf_update/kmail.upd
/usr/share/kde4/apps/kconf_update/mailfilteragent.upd
/usr/share/kde4/apps/kconf_update/migrate-kmail-filters.pl
/usr/share/kde4/apps/kconf_update/upgrade-signature.pl
/usr/share/kde4/apps/kconf_update/upgrade-transport.pl