Don't ship /var/cache/man/* in the ISO
Originally created by @intrigeri on #9417 (Redmine)
Not only this directory needlessly takes room in ISO images, but it also
makes IUKs bigger than they could be (since there are time-based
variations in there). live-build
5.x has a hook that does rm -rf /var/cache/man/*
.
Feature Branch: bugfix/9417-no-var-cache-man