Thread:Extension talk:Push/Authentication question

In your well written instructions, you document that your extension will not work from a MW.16 install:

"If you are running wikis on localhost, pushing from a MW 1.16 install will not work, due to an issue in Cookie::validateCookieDomain. It can be fixed by replacing this method by it's MW 1.17 equivalent."

Being something of a novice, could you outline (step by step) the procedure necessary for replacing the MW1.16 with its MW1.17 equivalent?

Thank you