vncsrv "noclient" mode and some vncsrv / rfb fixes and cleanups
- vncsrv: noclient mode: simulation run even without client connected
- vncsrv / rfb: parse specific options before starting server thread
- vncsrv / rfb: panic on invalid timeout value
- vncsrv: don't wait for client connection if timeout value is 0
- vncsrv / rfb: removed unnecessary newlines


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11705 6c8e4198-a580-4521-a02f-c9ae86df1db9