[1.0.X] Fixed #2782 -- Make the server port available through the modpython

handler.  (Originally applied in r3866, reverted in r3927 and now verified as
correct).

Backport of r9512 from trunk. This is a bugfix, since the value is used in
HttpRequest.get_host().


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9513 bcc190cf-cafb-0310-a4f2-bffc1f526a37