overwrite default.ini after install

couchdb.rb

diff --git a/Library/Formula/couchdb.rb b/Library/Formula/couchdb.rb
index c77e70c..258140b 100644
--- a/Library/Formula/couchdb.rb
+++ b/Library/Formula/couchdb.rb
@@ -59,6 +59,25 @@ class Couchdb < Formula
     (var+'log/couchdb').mkpath
   end

+  def post_install
+    if new_default_ini.exist?
+      mv default_ini, old_default_ini
+      mv new_default_ini, default_ini
+    end
+  end
+
+  def default_ini
+    "#{etc}/couchdb/default.ini"
+  end
+
+  def new_default_ini
+    "#{etc}/couchdb/default.ini.default"
+  end
+
+  def old_default_ini
+    "#{etc}/couchdb/default.ini.old"
+  end
+
   plist_options :manual => "couchdb"

   def plist; <<-EOS.undent