MFC 358674, 358916:
ftw.3: Add examples
PR: 173448 [1]
Submitted by: fernape@ (previous version) [1]
Reviewed by: jilles
Approved by: bcr (mentor)
Differential Revision: https://reviews.freebsd.org/D21750
ftw.3: Follow style(9) in the example
Reported by: oshogbo
Approved by: bcr (mentor)
Differential Revision: https://reviews.freebsd.org/D24043