There are some formulas in which Homebrew symlinks configuration files
into /usr/local/etc/ instead of copying them, resulting in custom
settings being overwritten on package upgrades. This addition to the
documentation illustrates one way to avoid this behavior by ensuring the
configure script is told where to copy the configuration file(s).
Refs https://github.com/Homebrew/homebrew-core/issues/8711
Addressing a few spots where I looked for terminology and did not find what I was looking for. Input based on a recent [podcast with Mike](https://changelog.com/podcast/223)
