New-Maintainer-Checklist: update.

Further terminology in docs + link on README

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)

Update to the latest status quo.

Fix warning for HOMEBREW_REPOSITORY at /usr/local

keg_relocate: fix for multiline /usr/bin/file output

Deprecate apr requirement.

It's not used on enough configurations now that there's little point in
keeping it around. See e.g. `:autoconf` for prior art.

keg_relocate: relocate text_executable? files.

apr_requirement: use Homebrew's Apr for Sierra

This was omitted from #1258, incorrectly fixed in #1267, reverted in
 #1268 and re-applied in this commit.

Revert "keg_relocate: left out text_executable? check in #1258"

keg_relocate: left out text_executable? check in #1258

brew.sh: warn on $HOMEBREW_REPOSITORY/Cellar

keg_relocate: run /usr/bin/file in batches

postinstall: allow write access to cellars in repository.

Allow auditing of a single language of a cask.

Fix CaskCommandFailedError.

tab: don't interpret unknown deps as no deps

If you’re using a /usr/local prefix but e.g. /usr/local/homebrew/Cellar
then you’ll miss out on most binary packages for no good reason so warn
people of that.

If HOMEBREW_CELLAR (or HOMEBREW_PREFIX) are children of
HOMEBREW_REPOSITORY it’s important to deny write to the repository and
enable write to the Cellar/prefix afterwards.

Fix getting cask path for queries.

brew.sh: allow --prefix to be run as root without warning

Update URL in qualified_token comment

The homebrew/homebrew wiki no longer exists.

diagnostic: handle HOMEBREW_TEMP mktmpdir failure.