Hello development folks,
looking at it's Git repository (https://github.com/jonasob/jwhois), jwhois does not seem to be maintained anymore. It's last commit currently dates November 20th, 2015, while the latest release was tagged on July 10th, 2005.
Debian switched to another WHOIS client (https://github.com/rfc1036/whois), being far more actively maintained than jwhois (see also: https://packages.debian.org/buster/whois). From my point of view, we should to as well.
Since I am currently short on spare time: Is someone volounteering to do this for me?
Whoever it will be, thank you. :-)
Thanks, and best regards, Peter Müller