I've been struggling with an XWiki bundled with jetty for which I can't set anything similar such as a VHost. Unfortunately, I cannot put a ProxyPassReverse (or ProxyPreserveHost) at the Apache level for lack of a plugin thus all redirects are expressed to localhost. My wiki is not intended to be used virtually.
Since i found no other contributions to this subject, I've written a small URLFactory which can be found here: https://github.com/polx/absolute-xwiki-urlfactory This factory also includes possibilities for content-distribution-networks such as Amazon CloudFront. Maybe xwiki.home was supposed to be used for that, but I couldn't get it to work (on xwiki-8.2): all my redirects ended up to localhost:8080. If there's a better way to share, feel free to indicate it. paul