kanaka/noVNC — pull request #170 by kassah (2012-06-07 06:21:38+00:00)
Title: Add ultravnc_repeater.pl support

As discussed in #103. Change differs from patch provided in issue in that ID: is not prefixed to repeaterID. This is so that you may use an arbitrary host via repeater (i.e. navigating though NAT via port forward using host:port for repeaterID) or via a VNC server that is connected to the ultravnc_repeater.pl daemon directly (ID:#).

I believe x11vnc calls this a prefix. Seems to vary client to client as to what it's called or how it works, but is pretty widely supported.