This is the illumos webrev-publishing server.
In order to publish a webrev, you'll first need to make sure your SSH key is up-to-date in redmine. Then, you can use webrev(1) to generate and upload your webrev, all at once, thus:
webrev -t rsync://firstname.lastname@example.org:SOME_NAME -O -U
You can delete a previously uploaded webrev thus:
webrev -t rsync://email@example.com:SOME_NAME -D
Note that SOME_NAME is an arbitrary string that will form part of the URL to your webrev. Note, also, that you should always use "webrev@" in the rsync URL, not your redmine username.
Once uploaded, your webrev will be in your directory here: http://cr.illumos.org/~webrev