Starts the DECwindows X proxy manager.
The DECwindows proxy manager relieves proxy clients from
managing proxy servers. Instead of sending a request directly
to a proxy server, the client sends a request to the proxy
manager indicating the requested X server. The proxy manager is
responsible for either using an existing proxy server or starting
a new proxy server. Once the manager finds a proxy server it
returns the proxy server's address to the client. The proxy
manager is an optional DECwindows component.
If the proxy manager is used it is usually started automatically
at DECwindows startup time.