[1.0.X] Fixed #9434 -- Added a note to the mod_python docs regarding requiring

PythonInterpreter in different VirtualHost blocks that share the same server
name. Thanks to Graham Dumpleton for the clarification.

Backport of r9268 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9271 bcc190cf-cafb-0310-a4f2-bffc1f526a37