The BrowserControl functor lets an Mozart application control
Under Unix, the system browser is hard-coded to be 'netscape'.
Netscape must be in your PATH for this to work. This has been
tested with the following platforms: AIX, HP-UX and Solaris.
Under Windows, this will bring up the default browser under windows,
usually either Netscape or Microsoft IE. The default browser is
determined by the OS. This has been tested under Windows 95/98/NT.
Note - you must include the url type -- either "http://" or "file://".