IE DOM hostname doesn't match GET request Host header

[cweb]

See test cases:

idna2008 - 1
idna2008 - 3

IE's DOM property for hostname is the pure Unicode version of the label, e.g. "βόλοσ.com.urltest.lookout.net" which does not match the GET request punycode Host header "xn--nxasmq6b.com.urltest.lookout.net"