Fixed incorrect FSU output when line strafing

When line strafing, if dist[0] < dist[1] then the incorrect FSU values will be
printed to the console, even though the optimal and correct values are actually
being used to do the strafing.  This can cause problems when generating the
final legit script.
Use pm_wishspeed for L, use pmove->maxspeed for pm_wishspeed

We now set pm_wishspeed to pmove->maxspeed directly.  The previous code was
used by the earliest versions of TasTools.  More importantly, L is now
pm_wishspeed.  The previous code is incorrect for ducked groundstrafing.
Fixed values of forwardmove and sidemove when ducking

They must be multiplied by PLAYER_DUCKING_MULTIPLIER when ducking.