Fixed #15642 -- Removed redundant imports in http/__init__.py. Thanks, jammon

    def __init__(self, query_string, mutable=False, encoding=None):

        MultiValueDict.__init__(self)

        if not encoding:

            # *Important*: do not import settings any earlier because of note

            # in core.handlers.modpython.

            from django.conf import settings

            encoding = settings.DEFAULT_CHARSET

        self.encoding = encoding

        for key, value in parse_qsl((query_string or ''), True): # keep_blank_values=True

    def _get_encoding(self):

        if self._encoding is None:

            # *Important*: do not import settings at the module level because

            # of the note in core.handlers.modpython.

            from django.conf import settings

            self._encoding = settings.DEFAULT_CHARSET

        return self._encoding