Main

- Add ini option for permanent controller assignment to specific player.

- Add MiSTer_cmd command: volume mute/unmute/0-7.

- pcxt: HDD support, based on AO486 (spark2k06).

- input: add pageup/pagedown buttons to controller in linux console and other tweaks.

- Debug print of current config. (should help to find a wrong setting)

- Other tweaks and fixes.