audit: add rules for naming

- restrict old names as names of new formulae
- warn about dependencies on old names

Library/Homebrew/cmd/audit.rb

@@ -6,6 +6,7 @@ require "official_taps"
 require "tap_migrations"
 require "cmd/search"
 require "date"
+require "formula_renames"
 
 module Homebrew
   def audit
@@ -229,6 +230,11 @@ class FormulaAuditor
       return
     end
 
+    if FORMULA_RENAMES.key? name
+      problem "'#{name}' is reserved as the old name of #{FORMULA_RENAMES[name]}"
+      return
+    end
+
     if !formula.core_formula? && Formula.core_names.include?(name)
       problem "Formula name conflicts with existing core formula."
       return
@@ -270,6 +276,10 @@ class FormulaAuditor
           next
         end
 
+        if FORMULA_RENAMES[dep.name] == dep_f.name
+          problem "Dependency '#{dep.name}' was renamed; use newname '#{dep_f.name}'."
+        end
+
         if @@aliases.include?(dep.name)
           problem "Dependency '#{dep.name}' is an alias; use the canonical name '#{dep.to_formula.full_name}'."
         end