Add Zantech KVM Austrlia [1],[2].
Remove TPC IT Pty, Ltd [3], the website seems to be invalid (does not
resolve anymore).

PR: docs/77496 [3], docs/77497 [2]
Requested by: Doug schache <doug dot schache at zantech dot com dot au> [1]
Submitted by: Jesus R. Camou <jcamou at cox dot net>
Approved by: simon (mentor)