make "slow" footsteps work in multiplayer semi reliably

sanity check

sv_dynamicspeed_stepsoundtime_add 0
sv_dynamicspeed_stepsoundtime_exponent 0.6
sv_dynamicspeed_stepsoundtime_mult 2600

new formula and new commands!!

- Added sv_dynamicspeed_footstep_workaround. (Enable a workaround for footsteps, which makes them play even if your speed is too low. (under 90 or under 60 when crouched)
- Fixes and improvements

convar for crouch speed (sv_dynamicspeed_crouch_speed)

mfw shit doesnt upload properly

fixed the super speed bug

update convars

forgot to remove the debug print lol

multiplayer fix