There's edge-cases which is breaking tap CI.

Add `cask_files` method to `Tap` class.

Catch system libressl in openssl audit as well

test-bot: never cleanup homebrew/core.

doc/Interesting-Taps-&-Branches: rename to Interesting-Taps-&-Forks

Otherwise weird things happen and formulae can't be found.

Fix shell profile

Update the description to reflect that we may be talking about either crypto library and neither is okay. :)

This document lists Tigerbrew and Linuxbrew as interesting forks, not
branches (they used to be "Interesting Branches (aka forks)" but that
changed in b7455469), so "Interesting Taps & Branches" is a more fitting
title.

The term "branches" is also presumably confusing to folks with a shallow
understanding of GitHub and/or git who may not realize how GitHub forks
and git branches are related.

--env: support more shells, allow explicit shell selection

test-bot: use UPSTREAM_BOTTLE_KEEP_OLD.

This is set by Jenkins to indicate a downstream bottle upload job needs
to use `brew bottle --keep-old`.

bottle: revert --keep-old changes.

update-report: add newline if preinstall updated.

test-bot: cleanup all repositories.

bump-formula-pr: audit formula before opening PR

note that it was made opt-in not opt-out

tap_constants: allow formulae to have @ in name.

This reverts commit 5e9bb877.

This reverts commit ec143749.

The test bot currently only focuses on doing cleanup on the current tap
and the HOMEBREW_REPOSITORY. This should be extended to cover all
repositories as e.g. a syntax error in homebrew/core can break the CI
for all the other taps.

test-bot: add missing @tap check.

Follow-up from #812 to fix handling fully-qualified versioned formulae
names.

Allows pulling https://github.com/Homebrew/homebrew-core/pull/971.

test-bot: don't run brew tests etc. when formulae.

bottle: allow --keep-old to ignore same sha256s.

The regex didn't match libcrypto.35.dylib, and it should have.

If there's formulae changes or the specified argument is a formula then
don't waste time running e.g. `brew tests`.

It should refuse to change existing ones but it should allow them to be
the same and silently ignore.

Fixes #858.

bottle: fix --keep-old JSON generation.

Ensure that the JSON file contains all the bottle checksums when using
`--keep-old`. This avoids having to use the formula DSL when merging and
relies on existing integrity checks.

This change does nothing differently if `--keep-old` is not passed.

audit: detect partial component order compliance

Don't reject -L/usr/local/lib when SDKROOT is defined

Closes #844. Fixes Homebrew/homebrew-fuse#62.

brew.sh: allow cask to be run as root.

utils: fix link_path_manpages message indentation.