Created attachment 176655 [details] snd_uaudio.4.diff snd_uaudio(4) links to http://www.usb.org/developers/devclass_docs/ which does not exist. The correct URL is http://www.usb.org/developers/docs/devclass_docs/.
A commit references this bug: Author: bcr Date: Sat Nov 12 19:45:55 UTC 2016 New revision: 308583 URL: https://svnweb.freebsd.org/changeset/base/308583 Log: Fix a broken link to the USB audio class specs. PR: 214240 Submitted by: Tobias Kortkamp t@tobik.me MFC after: 5 days Changes: head/share/man/man4/snd_uaudio.4
A patch was committed to HEAD to fix the link. Waiting for MFC time to arrive.
A commit references this bug: Author: bcr Date: Sun Feb 5 21:56:36 UTC 2017 New revision: 313304 URL: https://svnweb.freebsd.org/changeset/base/313304 Log: MFC r308583: Fix a broken link to the USB audio class specs. PR: 214240 Submitted by: Tobias Kortkamp t@tobik.me Changes: _U stable/11/ stable/11/share/man/man4/snd_uaudio.4
Belatedly close this PR after the MFC was finally done. Sorry for the delay. PR closed!