In Python 3 on Windows, pydoc fails to display source file listings in the browser.

To reproduce in Python 3.4:

   1. start pydoc:
   
   python -m pydoc -p 8888

   2. Navigate to the url: 
   
   http://127.0.0.1:8888/getfile?key=///C:/python34/lib/pydoc.py

The error message:

    getfile?key=///C:/python34/lib/pydoc.py
                FileNotFoundError: [Errno 2] No such file or directory: '///C:/python34/lib/pydoc.py'
            
The url passed to html_getfile needs to be converted into a NT pathname.