illumos gate

git commit e49fc96399e3e599d5736b0968a49892988d60b3

commit  e49fc96399e3e599d5736b0968a49892988d60b3
Author: Andy Fiddaman <omnios@citrus-it.co.uk>
Date:   2021-03-25T20:23:34.000Z

    13612 Convert ksh93.1 to mdoc
    Reviewed by: Volker A. Brandt <vab@bb-c.de>
    Approved by: Rich Lowe <richlowe@richlowe.net>