Fixed #1638 -- Documented shortcomings of development server in docs/django-admin.txt

might not have access to start a port on a low port number. Low port numbers

are reserved for the superuser (root).

DO NOT USE THIS SERVER IN A PRODUCTION SETTING.

DO NOT USE THIS SERVER IN A PRODUCTION SETTING. It has not gone through

security audits or performance tests. (And that's how it's gonna stay. We're in

the business of making Web frameworks, not Web servers, so improving this

server to be able to handle a production environment is outside the scope of

Django.)

The development server automatically reloads Python code for each request, as

needed. You don't need to restart the server for code changes to take effect.