Ask the XMosaic WWW browser to load URL.
Default to the URL around or before point.
This function only works for XMosaic version 2.5 or later. You must
select `CCI' from XMosaic's File menu, set the CCI Port Address to the
value of variable `browse-url-CCI-port', and enable `Accept requests'.
When called interactively, if variable `browse-url-new-window-flag' is
non-nil, load the document in a new browser window, otherwise use a
random existing one. A non-nil interactive prefix argument reverses
the effect of `browse-url-new-window-flag'.
When called non-interactively, optional second argument NEW-WINDOW is
used instead of `browse-url-new-window-flag'.
(fn URL &optional NEW-WINDOW)