[1.0.X] Fixed #8964 -- Added a note that MyISAM may not necessarily be the default

storage engine for MySQL. Some packagers seem to like causing confusion.

Backport of r9143 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9144 bcc190cf-cafb-0310-a4f2-bffc1f526a37