The problem: the various checks were surrounded by things like
    #ifdef HAVE__DEV_MOUSE
    If the host on which the client is built doesn't have a mouse
    (as is the case with our build machine)
    then the resulting executable doesn't check /dev/mouse,
    even if it exists on the target host.
- removed configure checks for /dev/mouse, /dev/kbd, and /dev/tty1

svn path=/trunk/boinc/; revision=13947