Allowed runserver sublcasses to easily override the default port.

from django.utils import autoreload, six

from django.utils.encoding import force_text, get_system_encoding

naiveip_re = re.compile(r"""^(?:

(?P<addr>

    (?P<ipv4>\d{1,3}(?:\.\d{1,3}){3}) |         # IPv4 address

    (?P<ipv6>\[[a-fA-F0-9:]+\]) |               # IPv6 address

    (?P<fqdn>[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*) # FQDN

):)?(?P<port>\d+)$""", re.X)

DEFAULT_PORT = "8000"

class Command(BaseCommand):

    requires_system_checks = False

    leave_locale_alone = True

    default_port = '8000'

    def add_arguments(self, parser):

        parser.add_argument('addrport', nargs='?',

            help='Optional port number, or ipaddr:port')

        self._raw_ipv6 = False

        if not options.get('addrport'):

            self.addr = ''

            self.port = DEFAULT_PORT

            self.port = self.default_port

        else:

            m = re.match(naiveip_re, options['addrport'])

            if m is None: