User documentation updates
- added new gui "vncsrv" and new bochsrc options "sound" and "speaker"
- related changes in the "sb16" and "es1370" descriptions
- started update of the SB16 documentation
- changed the order of some bochsrc options
- TODO #1: sync the order of bochsrc options in all files
- TODO #2: replace SB16 section by a new one (e.g. "Using sound")
- TODO #2: update SB16 stuff in the developer doc


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11742 6c8e4198-a580-4521-a02f-c9ae86df1db9