[$] Moving Python's bugs to GitHub

Over the past seven years or so, Python has slowly been moving itsdevelopment infrastructure to GitHub; we covered some of the early discussions at theend of 2014. One piece of that infrastructure, bug tracking, has not beenmoved from bugs.python.org, but plansare underway to make that happen soon. It is not a simple orstraightforward process to do so, however, so the transition will take upto a week to complete; there are a number of interesting facets to theswitch, as it entails clearing some technical, and even legal, hurdles.