cad/k40-whisperer: Update 0.59 => 0.70, take maintainership

Changelogs:
* https://www.scorchworks.com/K40whisperer/k40whisperer_change_log.html

* Make DOCS option actually work
* Pet portclippy(1) and portfmt(1)

Approved by:		yuri@ (Mentor)
Differential Revision:	https://reviews.freebsd.org/D53192