* For RR, `processweapon_r()` was performing angle and horizon changes directly which provided a harsh experience with the default `cl_syncinput 0` mode.
* Added `angAdjust` variable to `player_struct` for use with ticrate angle adjustments.
* Renamed `horizAngleAdjust` to `horizAdjust` so that there is less confusion with the new `angAdjust` variable.
* Removed `horizSkew` variable, can just use `horizAdjust` for this.
* Replaced all calls to `addang()` and `addhoriz()` with the appropriate additions/subtractions to `angAdjust` and `horizAdjust` respectively.
* Removed now unused `addang()` and `addhoriz()` setters from `player_struct`.
* Define new function `resetinputhelpers()` to eliminate code duplication between `processinput_d()` and `processinput_r()` functions.
* Remove `p->q16ang` and `p->q16horiz` direct setting from `FinalizeInput()`.
* Change `applylook()` to accept an `fixed_t adjustment` for changing the player's angle. This can either be `input.q16avel` when `cl_syncinput` is 0, or `sync[snum].q16angvel` when `cl_syncinput` is 1.
* Change `sethorizon()` to accept an `fixed_t adjustment` for changing the player's horizon. This can either be `input.q16horz` when `cl_syncinput` is 0, or `sync[snum].q16horz` when `cl_syncinput` is 1.
* Re-work `sethorizon()` to always adjust `p->q16horiz` using the true pitch code. This closer resembles the EDuke32 implementation as per SVN 7342.
* Re-work returning to center to work off the true pitch code and always ensure that the player returns to center.
* Implement work-around for RR where we need to call `sethorizon()` before the call to `fi.doincrements()` like the original game, but also after the call to `processweapon()` to apply any angle or horizon changes due to weapon recoil, etc. We work around this by calling `sethorizon()` from within `doincrements_r()` only if `cl_syncinput` is 1 and only if `doincrements_r()` is to return 1.
* Handle button-mashing to provide a better experience.
* Rename `bike_turn` to `boat_turn`.
* Move application of scale to returning value within `boatApplyTurn()`.
* Use doubled return values like Rednukem (20 -> 40, 10 -> 20, 6 -> 12, 3 -> 6, 2 -> 4, 1 -> 2).
* Return `p->TiltStatus` towards 0 if `p->MotoSpeed` == 0 and `p->NotOnWater`.
* Always test if `p->TiltStatus` < `0.025`.
* If player was turning left and right, only left was returned. Now, both apply (effectively cancelling each other out.
* Move application of scale to returning value within `motoApplyTurn()`.
Hard-coded value of `10.0` was too low and was always being used instead of the value of `(now - lastCheck)`. This made `scaleAdjust` inaccurate and not fast enough.
The checks for game pause were totally inconsistent, so now there is a utility function that tells whether the game is supposed to run or not.
pause can also take 3 values now - 0 for no pause, 1 for pause from opening the menu or console or 2 for hitting the pause button.
The one for holding the turn key needs to be reset any time there is no turning and everything needs to be cleared when the input state is cleared. And all need to check for the case where the static state is not set yet.
