Codechange: Redefine some cargo-related values in terms of CargoID instead of CargoType.

Values used as special filter types are now defined as offsets from NUM_CARGO instead of confusingly reusing CARGO_NO_REFIT/CARGO_AUTO_REFIT types.

Fix #10511: Delay 'go to nearest depot' orders (#11548)

Delay the nearest depot order search for a day if the vehicle can't find its destination, which happens when it has already attempted to do so and failed to find a valid destination.

Codechange: Add base() method to StrongType to allow access to the base type without casting. (#11445)

This removes the ability to explicitly cast to the base type, but the requirement
to use .base() means the conversion is still explicit.

Cleanup: Remove some unused functions. (#11429)

These were picked up with cppcheck.

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

Codechange: add non-nullptr asserts in cases where it should never be nullptr

Though where similar calls are checked for nullptr as in those instances of
the use of that function it can actually return nullptr. In other words, write
down the assumption that the function never returns nullptr in an assert.

Codechange: Template DoCommand to automagically reflect the parameters of the command proc.

When finished, this will allow each command handler to take individually
different parameters, obliviating the need for bit-packing.

Codechange: Let the compile generate the master command table out of templated command traits.

This is using a non-intrusive type-traits like templated system, which
allows compile-time validation that the command table and the command
enum match up.

Codechange: "set but not used" warning when disabling assert() (#9613)

DebugCheckSanity() is unused when asserts are disabled. While at it,
use WITH_ASSERT over NDEBUG, as that means we also run this code
during beta/RC.

Change: Remove ship max order distance.

It is skipped when NPF is in use.
It is trivial to work around by adding and removing dummy orders.
It is mostly alleviated by the ship path cache in YAPF.

Fix #7391, 9b99b95: Don't invalidate go to depot orders of non-aircraft when invalidating hangar orders that happen to share IDs.

This was caused because hangars are referred to by station ID, which is not unique with respect to depot IDs.

Fix #6574: Remove go to hangar orders when rebuilding airport

When replacing an airport with another, cancel current orders of type 'go to depot' from aircraft still heading to it if the rebuilt airport doesn't have a hangar (helicopter vs heliport), or if the airplane can't land on the rebuilt airport (airplane vs helistation).

Removes 'go to hangar' orders from all aircraft when replacing an airport with hangar with another without hangar (heliport).

Fix: Direct the aircraft to the correct location of the hangar when skipping to a go to hangar order

When manually skipping to a 'go to hangar' order in the order list, while the aircraft is flying, direct the aircraft to the correct location of the hangar.