feat: add audit for wayback machine URLs

Library/Homebrew/formula_auditor.rb

@@ -590,6 +590,26 @@ def audit_bottle_spec
  new_formula_problem "New formulae in homebrew/core should not have a `bottle do` block"
  end
 
+ def audit_wayback_url
+ return unless @core_tap
+ return if formula.deprecated? || formula.disabled?
+
+ regex = %r{^https?://web\.archive\.org}
+ if regex.match?(formula.stable.url)
+ problem "Formula with a Wayback URL should be deprecated with `:repo_removed`"
+ return
+ end
+
+ if regex.match?(formula.homepage)
+ problem "Formula with a Wayback homepage should find an alternative homepage"
+ return
+ end
+
+ return unless formula.head && regex.match?(formula.head.url)
+
+ problem "Formula with a Wayback `HEAD` URL should not have a `HEAD` definition"
+ end
+
  def audit_github_repository_archived
  return if formula.deprecated? || formula.disabled?