[ include/config.h.in has changed, don't forget tu run ./configure ]

 . fixed the --aout, --idct and --yuv flags
 . updated manpage and --(long)help output to reflect that change
 . removed a few unneeded #includes here and there
 . cosmetic changes in error messages in input.c

   Currently available flags are now :

     --aout dummy
            esd
            dsp
            alsa

     --idct idct
            idctclassic
            idctmmx

     --yuv yuv
           yuvmmx

  --vout works like before, but still uses the old plugin system for now.