Codechange: automatic adding of _t to (u)int types, and WChar to char32_t

for i in `find src -type f|grep -v 3rdparty/fmt|grep -v 3rdparty/catch2|grep -v 3rdparty/opengl|grep -v stdafx.h`; do sed 's/uint16& /uint16 \&/g;s/int8\([ >*),;[]\)/int8_t\1/g;s/int16\([ >*),;[]\)/int16_t\1/g;s/int32\([ >*),;[]\)/int32_t\1/g;s/int64\([ >*),;[]\)/int64_t\1/g;s/ uint32(/ uint32_t(/g;s/_uint8_t/_uint8/;s/Uint8_t/Uint8/;s/ft_int64_t/ft_int64/g;s/uint64$/uint64_t/;s/WChar/char32_t/g;s/char32_t char32_t/char32_t WChar/' -i $i; done

Fix #10502: Refit engine before attaching free wagons. (#10926)

Caused by incorrect order of operations when buying a train engine with refit and attaching free wagons.

Change: Avoid crashing to the side of a train

When a road vehicle is already running on a multi level crossing, and a train shows up ahead, don't make the road vehicle crash on the side of the train.

Change: Support flipping shorter engines without NewGRF support. (#10262)

* Change: Support flipping shorter engines without NewGRF support.
* Cleanup: Remove write-only prop27_set temporary flag.

Codechange: Revenue is not the same as Income

Income is revenue minus costs. Let's name things correctly (without breaking the script API).

Change: Remove direction parameter from Vehicle::UpdateDeltaXY. (#6792)

The value is either unused or always the same as this->direction.

(svn r27811) -Change: Remove unused parameters in FreeTrainTrackReservation

FreeTrainTrackReservation is always called with INVALID_TILE
and INVALID_TRACKDIR as second and third arguments, so remove
them and just use those constants instead. (cirdan)

(svn r19341) -Codechange: Move GOINGUP/GOINGDOWN flags to GroundVehicle.
-Codechange: Move GetSlopeResistance to GroundVehicle.

(svn r18781) -Codechange: pass the CommandCost to the callback instead of whether it succeeded or not.
-Fix: AIs did update their last cost incorrectly in network games if the cost of the DC_EXEC phase differed from the ~DC_EXEC phase.