GET http://foo/bar HTTP/1.0
REMOVED-Referer: xyz://a/b
REMOVED-Referer: http://foo/xyz
REMOVED-Referrer: http://foo/xyz
REMOVED-Referer: ftp://foo/bar
REMOVED-Referer: http://foo:80/bar
REMOVED-Referer: http://foo:81/bar
REMOVED-Referer: http://FOO/bar
REMOVED-Referer: http://FOO/BAR
referer: http://abc/def
Accept-Encoding: identity

