Discuss starting to phase out support for Python 2.3

Russell gave a list of reasons for why 2.3 is still necessary when I asked about it here:

http://code.djangoproject.com/ticket/7786#comment:6

We do have people quite recently reporting they are running Django on 2.3: #8910, #8606, #8577, #8226, #7734, #7608, #7418, #7365, #7354, etc. (Those are not all problems identified with Django on 2.3, they just indicate the users -- who I think are all different, I tried to skip ones from the same people, and ones opened just to get the test suite running on 2.3 -- are running Python 2.3.)

Not trying to throw a damper on the idea (I was hoping 2.3 could be dropped when I asked the question in #7786), just provide some data.

We've discussed this on django-dev; 1.1 will be the last version to support 2.3.