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What ever happened to ihnp4?
(screencap via http://acornabbey.com/blog/?p=2962 )
https://octodon.social/media/dNA6mBbzYTolm4YeUJY
August 1988: the removal of ihnp4 announced on #usenet group comp.mail.misc.
https://groups.google.com/forum/#!topic/comp.mail.misc/0lvL1aE_UDs