fyi: I've entered the following bug:*
*Affects Version/s: 0.9.1252
If xwiki.virtual.redirect is not specified for a virtual wiki,
attempting to access a subdomain that does not correspond to a wiki
causes the browser to be redirected repeatedly to the same invalid url.
xwiki.virtual.redirect is commented out and has an unhelpful value by
default.
(The default is ...127.0.0.1/..., but a valid external URL is needed.)
-Trevor