Serve 404 from Inspector instead of pypi.org

[miketheman]

When using Inspector in an iframe, if the package lookup isn't found, a 404 from pypi.org is served.

This makes setting frame-src directives in a content security policy longer, since now it has to allow two domains, instead of serving the 404 directly.

In or around here:

inspector/inspector/main.py

Lines 67 to 68 in 5756f29

	if resp.status_code != 200:
	return redirect(pypi_project_url, 307)