Fixed #17220 - Documented git clone command for git < 1.6.6; thanks krzysiumed for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17139 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/topics/install.txt

@@ -257,8 +257,10 @@ latest bug fixes and improvements, follow these instructions:
 
    .. code-block:: bash
 
-       # Git
+       # Git (requires version 1.6.6 or later)
        git clone https://github.com/django/django.git
+       # or (works with all versions)
+       git clone git://github.com/django/django.git       
 
        # Mercurial
        hg clone https://bitbucket.org/django/django