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/

• Handle 100-continue: do not forward expect header from client, ignore 100 continue response replied by some web servers
• For windows: add cow-hide.exe to run cow.exe as background process, (provided by to xupefei)
• Filter sites covered by user specified domains on load
• Fix incorrectly changing header value to lower case: user name and password can now contain upper case letters