Make save/restore default feature, the configure option for save/restore removed from configure script and save/restore made available forever. All code now assume it is exists. Bochs save/restore tree previosly called "save_restore" renamed to "bochs" tree and it will be havily used everywhere, starting from save/restore and ending by various bochs debugger functions. I am going to rework debugger code to get rid of debug CPU access functions and use this "bochs" param tree instead
- removed obsolete structures and members from the USB code
- removed mouse type 'usb' (USB mouse and tablet override selected mouse type
when connected)
- user doc: mention vmware 4 disk image support
generate absolute x/y values if tablet connected)
- store device name string in member d.devname
- report unknown/unsupported requests as errors
- usb_msd: removed unnecessary type definition
* removed old-style mouse stuff
* TODO: implement USB tablet from Qemu and re-implement Bochs USB keypad
- clear out USB hub structures in constructor to avoid segfault
- keyboard: mouse capture flag must affect all mouse types
