For OS X and Linux, run the following command to update

curl -s -L https://github.com/cyfdecyf/cow/raw/master/install-cow.sh | bash

For Windows, please download from http://dl.chenyufei.info/cow/

• Fix bug for close connection response with no body
• Fix response not keep alive by default
• Always try parent proxy upon DNS/connection error
• Do not take special handling on log with debug option
• Add proxy status statistics in debug code