Suggested addition, after the "kldload if_..." lines:
To make this change permanent and load the driver as a module at boot time, place the appropriate line of the following in loader.conf(5):
Created attachment 209142 [details]
Add /boot/loader.conf example.
While there, also correct markup above.
A commit references this bug:
Date: Fri Feb 14 19:31:47 UTC 2020
New revision: 53894
Addition to section 31.4. USB Tethering of the handbook
Submitted by: firstname.lastname@example.org
Patch by: email@example.com
Approved by: bcr@(mentor)
Differential Revision: https://reviews.freebsd.org/D23613
Fixed! Thanks for the patch!